Migrate impeller/**.h to header guards. (flutter/engine#48962)

Automatically generated by https://github.com/flutter/engine/pull/48903.

Progress towards https://github.com/flutter/flutter/issues/133415.

engine/src/flutter/impeller/aiks/aiks_context.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_AIKS_AIKS_CONTEXT_H_
+#define FLUTTER_IMPELLER_AIKS_AIKS_CONTEXT_H_
 
 #include <memory>
 
@@ -51,3 +52,5 @@ class AiksContext {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_AIKS_AIKS_CONTEXT_H_

engine/src/flutter/impeller/aiks/aiks_playground.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_AIKS_AIKS_PLAYGROUND_H_
+#define FLUTTER_IMPELLER_AIKS_AIKS_PLAYGROUND_H_
 
 #include "flutter/fml/macros.h"
 #include "impeller/aiks/aiks_context.h"
@@ -41,3 +42,5 @@ class AiksPlayground : public PlaygroundTest {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_AIKS_AIKS_PLAYGROUND_H_

engine/src/flutter/impeller/aiks/canvas.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_AIKS_CANVAS_H_
+#define FLUTTER_IMPELLER_AIKS_CANVAS_H_
 
 #include <deque>
 #include <functional>
@@ -198,3 +199,5 @@ class Canvas {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_AIKS_CANVAS_H_

engine/src/flutter/impeller/aiks/canvas_recorder.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_AIKS_CANVAS_RECORDER_H_
+#define FLUTTER_IMPELLER_AIKS_CANVAS_RECORDER_H_
 
 #include <cstdint>
 
@@ -303,3 +304,5 @@ class CanvasRecorder {
 #endif
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_AIKS_CANVAS_RECORDER_H_

engine/src/flutter/impeller/aiks/canvas_type.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_AIKS_CANVAS_TYPE_H_
+#define FLUTTER_IMPELLER_AIKS_CANVAS_TYPE_H_
 
 #include "impeller/aiks/canvas.h"
 #include "impeller/aiks/canvas_recorder.h"
@@ -20,3 +21,5 @@ using CanvasType = Canvas;
 #endif
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_AIKS_CANVAS_TYPE_H_

engine/src/flutter/impeller/aiks/color_filter.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_AIKS_COLOR_FILTER_H_
+#define FLUTTER_IMPELLER_AIKS_COLOR_FILTER_H_
 
 #include "impeller/entity/contents/filters/color_filter_contents.h"
 #include "impeller/geometry/color.h"
@@ -176,3 +177,5 @@ class ComposedColorFilter final : public ColorFilter {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_AIKS_COLOR_FILTER_H_

engine/src/flutter/impeller/aiks/color_source.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_AIKS_COLOR_SOURCE_H_
+#define FLUTTER_IMPELLER_AIKS_COLOR_SOURCE_H_
 
 #include <functional>
 #include <memory>
@@ -103,3 +104,5 @@ class ColorSource {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_AIKS_COLOR_SOURCE_H_

engine/src/flutter/impeller/aiks/image.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_AIKS_IMAGE_H_
+#define FLUTTER_IMPELLER_AIKS_IMAGE_H_
 
 #include <memory>
 
@@ -30,3 +31,5 @@ class Image {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_AIKS_IMAGE_H_

engine/src/flutter/impeller/aiks/image_filter.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_AIKS_IMAGE_FILTER_H_
+#define FLUTTER_IMPELLER_AIKS_IMAGE_FILTER_H_
 
 #include "impeller/aiks/color_filter.h"
 #include "impeller/core/sampler_descriptor.h"
@@ -271,3 +272,5 @@ class LocalMatrixImageFilter : public ImageFilter {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_AIKS_IMAGE_FILTER_H_

engine/src/flutter/impeller/aiks/paint.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_AIKS_PAINT_H_
+#define FLUTTER_IMPELLER_AIKS_PAINT_H_
 
 #include <memory>
 
@@ -106,3 +107,5 @@ struct Paint {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_AIKS_PAINT_H_

engine/src/flutter/impeller/aiks/paint_pass_delegate.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_AIKS_PAINT_PASS_DELEGATE_H_
+#define FLUTTER_IMPELLER_AIKS_PAINT_PASS_DELEGATE_H_
 
 #include <optional>
 
@@ -81,3 +82,5 @@ class OpacityPeepholePassDelegate final : public EntityPassDelegate {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_AIKS_PAINT_PASS_DELEGATE_H_

engine/src/flutter/impeller/aiks/picture.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_AIKS_PICTURE_H_
+#define FLUTTER_IMPELLER_AIKS_PICTURE_H_
 
 #include <deque>
 #include <memory>
@@ -31,3 +32,5 @@ struct Picture {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_AIKS_PICTURE_H_

engine/src/flutter/impeller/aiks/picture_recorder.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_AIKS_PICTURE_RECORDER_H_
+#define FLUTTER_IMPELLER_AIKS_PICTURE_RECORDER_H_
 
 #include "flutter/fml/macros.h"
 #include "impeller/aiks/canvas.h"
@@ -25,3 +26,5 @@ class PictureRecorder {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_AIKS_PICTURE_RECORDER_H_

engine/src/flutter/impeller/aiks/testing/context_mock.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_AIKS_TESTING_CONTEXT_MOCK_H_
+#define FLUTTER_IMPELLER_AIKS_TESTING_CONTEXT_MOCK_H_
 
 #include <string>
 #include <utility>
@@ -115,3 +116,5 @@ class ContextMock : public Context {
 
 }  // namespace testing
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_AIKS_TESTING_CONTEXT_MOCK_H_

engine/src/flutter/impeller/aiks/testing/context_spy.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_AIKS_TESTING_CONTEXT_SPY_H_
+#define FLUTTER_IMPELLER_AIKS_TESTING_CONTEXT_SPY_H_
 
 #include <memory>
 #include "impeller/aiks/testing/context_mock.h"
@@ -28,3 +29,5 @@ class ContextSpy : public std::enable_shared_from_this<ContextSpy> {
 }  // namespace testing
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_AIKS_TESTING_CONTEXT_SPY_H_

engine/src/flutter/impeller/aiks/trace_serializer.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_AIKS_TRACE_SERIALIZER_H_
+#define FLUTTER_IMPELLER_AIKS_TRACE_SERIALIZER_H_
 
 #include <iostream>
 #include "impeller/aiks/canvas_recorder.h"
@@ -62,3 +63,5 @@ class TraceSerializer {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_AIKS_TRACE_SERIALIZER_H_

engine/src/flutter/impeller/archivist/archivable.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_ARCHIVIST_ARCHIVABLE_H_
+#define FLUTTER_IMPELLER_ARCHIVIST_ARCHIVABLE_H_
 
 #include <cstdint>
 #include <optional>
@@ -36,3 +37,5 @@ class Archivable {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_ARCHIVIST_ARCHIVABLE_H_

engine/src/flutter/impeller/archivist/archive.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_ARCHIVIST_ARCHIVE_H_
+#define FLUTTER_IMPELLER_ARCHIVIST_ARCHIVE_H_
 
 #include <functional>
 #include <memory>
@@ -72,3 +73,5 @@ class Archive {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_ARCHIVIST_ARCHIVE_H_

engine/src/flutter/impeller/archivist/archive_class_registration.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_ARCHIVIST_ARCHIVE_CLASS_REGISTRATION_H_
+#define FLUTTER_IMPELLER_ARCHIVIST_ARCHIVE_CLASS_REGISTRATION_H_
 
 #include <map>
 #include <optional>
@@ -49,3 +50,5 @@ class ArchiveClassRegistration {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_ARCHIVIST_ARCHIVE_CLASS_REGISTRATION_H_

engine/src/flutter/impeller/archivist/archive_database.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_ARCHIVIST_ARCHIVE_DATABASE_H_
+#define FLUTTER_IMPELLER_ARCHIVIST_ARCHIVE_DATABASE_H_
 
 #include <map>
 #include <memory>
@@ -53,3 +54,5 @@ class ArchiveDatabase {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_ARCHIVIST_ARCHIVE_DATABASE_H_

engine/src/flutter/impeller/archivist/archive_location.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_ARCHIVIST_ARCHIVE_LOCATION_H_
+#define FLUTTER_IMPELLER_ARCHIVIST_ARCHIVE_LOCATION_H_
 
 #include <optional>
 #include <type_traits>
@@ -171,3 +172,5 @@ class ArchiveLocation {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_ARCHIVIST_ARCHIVE_LOCATION_H_

engine/src/flutter/impeller/archivist/archive_statement.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_ARCHIVIST_ARCHIVE_STATEMENT_H_
+#define FLUTTER_IMPELLER_ARCHIVIST_ARCHIVE_STATEMENT_H_
 
 #include <memory>
 #include <type_traits>
@@ -95,3 +96,5 @@ class ArchiveStatement {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_ARCHIVIST_ARCHIVE_STATEMENT_H_

engine/src/flutter/impeller/archivist/archive_transaction.h

@@ -1,7 +1,8 @@
 // Copyright 2013 The Flutter Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
-#pragma once
+#ifndef FLUTTER_IMPELLER_ARCHIVIST_ARCHIVE_TRANSACTION_H_
+#define FLUTTER_IMPELLER_ARCHIVIST_ARCHIVE_TRANSACTION_H_
 
 #include <cstdint>
 
@@ -47,3 +48,5 @@ class ArchiveTransaction {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_ARCHIVIST_ARCHIVE_TRANSACTION_H_

engine/src/flutter/impeller/archivist/archive_vector.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_ARCHIVIST_ARCHIVE_VECTOR_H_
+#define FLUTTER_IMPELLER_ARCHIVIST_ARCHIVE_VECTOR_H_
 
 #include "impeller/archivist/archive.h"
 
@@ -35,3 +36,5 @@ class ArchiveVector : public Archivable {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_ARCHIVIST_ARCHIVE_VECTOR_H_

engine/src/flutter/impeller/archivist/archivist_fixture.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_ARCHIVIST_ARCHIVIST_FIXTURE_H_
+#define FLUTTER_IMPELLER_ARCHIVIST_ARCHIVIST_FIXTURE_H_
 
 #include "flutter/fml/macros.h"
 #include "flutter/testing/testing.h"
@@ -36,3 +37,5 @@ class ArchivistFixture : public ::testing::Test {
 
 }  // namespace testing
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_ARCHIVIST_ARCHIVIST_FIXTURE_H_

engine/src/flutter/impeller/base/allocation.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_BASE_ALLOCATION_H_
+#define FLUTTER_IMPELLER_BASE_ALLOCATION_H_
 
 #include <cstdint>
 #include <limits>
@@ -54,3 +55,5 @@ std::shared_ptr<fml::Mapping> CreateMappingWithString(
 std::shared_ptr<fml::Mapping> CreateMappingWithString(std::string string);
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_BASE_ALLOCATION_H_

engine/src/flutter/impeller/base/backend_cast.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_BASE_BACKEND_CAST_H_
+#define FLUTTER_IMPELLER_BASE_BACKEND_CAST_H_
 
 #include "flutter/fml/macros.h"
 
@@ -25,3 +26,5 @@ class BackendCast {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_BASE_BACKEND_CAST_H_

engine/src/flutter/impeller/base/comparable.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_BASE_COMPARABLE_H_
+#define FLUTTER_IMPELLER_BASE_COMPARABLE_H_
 
 #include <cstddef>
 #include <functional>
@@ -109,3 +110,5 @@ struct less<impeller::UniqueID> {
 };
 
 }  // namespace std
+
+#endif  // FLUTTER_IMPELLER_BASE_COMPARABLE_H_

engine/src/flutter/impeller/base/config.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_BASE_CONFIG_H_
+#define FLUTTER_IMPELLER_BASE_CONFIG_H_
 
 #include <cstdlib>
 
@@ -35,3 +36,5 @@ namespace impeller {
 }
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_BASE_CONFIG_H_

engine/src/flutter/impeller/base/promise.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_BASE_PROMISE_H_
+#define FLUTTER_IMPELLER_BASE_PROMISE_H_
 
 #include <future>
 
@@ -17,3 +18,5 @@ std::future<T> RealizedFuture(T t) {
 }
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_BASE_PROMISE_H_

engine/src/flutter/impeller/base/strings.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_BASE_STRINGS_H_
+#define FLUTTER_IMPELLER_BASE_STRINGS_H_
 
 #include <string>
 
@@ -20,3 +21,5 @@ bool HasSuffix(const std::string& string, const std::string& suffix);
 std::string StripPrefix(const std::string& string, const std::string& to_strip);
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_BASE_STRINGS_H_

engine/src/flutter/impeller/base/thread.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_BASE_THREAD_H_
+#define FLUTTER_IMPELLER_BASE_THREAD_H_
 
 #include <chrono>
 #include <condition_variable>
@@ -268,3 +269,5 @@ class ConditionVariable {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_BASE_THREAD_H_

engine/src/flutter/impeller/base/thread_safety.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_BASE_THREAD_SAFETY_H_
+#define FLUTTER_IMPELLER_BASE_THREAD_SAFETY_H_
 
 #if defined(__clang__)
 #define IPLR_THREAD_ANNOTATION_ATTRIBUTE__(x) __attribute__((x))
@@ -67,3 +68,5 @@
 
 #define IPLR_NO_THREAD_SAFETY_ANALYSIS \
   IPLR_THREAD_ANNOTATION_ATTRIBUTE__(no_thread_safety_analysis)
+
+#endif  // FLUTTER_IMPELLER_BASE_THREAD_SAFETY_H_

engine/src/flutter/impeller/base/timing.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_BASE_TIMING_H_
+#define FLUTTER_IMPELLER_BASE_TIMING_H_
 
 #include <chrono>
 
@@ -14,3 +15,5 @@ using Clock = std::chrono::high_resolution_clock;
 using TimePoint = std::chrono::time_point<std::chrono::high_resolution_clock>;
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_BASE_TIMING_H_

engine/src/flutter/impeller/base/validation.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_BASE_VALIDATION_H_
+#define FLUTTER_IMPELLER_BASE_VALIDATION_H_
 
 #ifndef IMPELLER_ENABLE_VALIDATION
 #ifdef IMPELLER_DEBUG
@@ -64,3 +65,5 @@ struct ScopedValidationDisable {
 ///   happens in test environments.
 ///
 #define VALIDATION_LOG ::impeller::ValidationLog{}.GetStream()
+
+#endif  // FLUTTER_IMPELLER_BASE_VALIDATION_H_

engine/src/flutter/impeller/base/version.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_BASE_VERSION_H_
+#define FLUTTER_IMPELLER_BASE_VERSION_H_
 
 #include <cstddef>
 #include <optional>
@@ -37,3 +38,5 @@ struct Version {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_BASE_VERSION_H_

engine/src/flutter/impeller/compiler/compiler.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_COMPILER_COMPILER_H_
+#define FLUTTER_IMPELLER_COMPILER_COMPILER_H_
 
 #include <initializer_list>
 #include <sstream>
@@ -64,3 +65,5 @@ class Compiler {
 
 }  // namespace compiler
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_COMPILER_COMPILER_H_

engine/src/flutter/impeller/compiler/compiler_backend.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_COMPILER_COMPILER_BACKEND_H_
+#define FLUTTER_IMPELLER_COMPILER_COMPILER_BACKEND_H_
 
 #include <cstdint>
 #include <memory>
@@ -71,3 +72,5 @@ struct CompilerBackend {
 
 }  // namespace compiler
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_COMPILER_COMPILER_BACKEND_H_

engine/src/flutter/impeller/compiler/compiler_test.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_COMPILER_COMPILER_TEST_H_
+#define FLUTTER_IMPELLER_COMPILER_COMPILER_TEST_H_
 
 #include "flutter/fml/macros.h"
 #include "flutter/testing/testing.h"
@@ -45,3 +46,5 @@ class CompilerTest : public ::testing::TestWithParam<TargetPlatform> {
 }  // namespace testing
 }  // namespace compiler
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_COMPILER_COMPILER_TEST_H_

engine/src/flutter/impeller/compiler/constants.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_COMPILER_CONSTANTS_H_
+#define FLUTTER_IMPELLER_COMPILER_CONSTANTS_H_
 
 namespace impeller {
 namespace compiler {
@@ -11,3 +12,5 @@ constexpr char kExternalTexturePrefix[] = "SAMPLER_EXTERNAL_OES_";
 
 }  // namespace compiler
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_COMPILER_CONSTANTS_H_

engine/src/flutter/impeller/compiler/include_dir.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_COMPILER_INCLUDE_DIR_H_
+#define FLUTTER_IMPELLER_COMPILER_INCLUDE_DIR_H_
 
 #include <memory>
 #include <string>
@@ -19,3 +20,5 @@ struct IncludeDir {
 
 }  // namespace compiler
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_COMPILER_INCLUDE_DIR_H_

engine/src/flutter/impeller/compiler/includer.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_COMPILER_INCLUDER_H_
+#define FLUTTER_IMPELLER_COMPILER_INCLUDER_H_
 
 #include <string>
 
@@ -58,3 +59,5 @@ class Includer final : public shaderc::CompileOptions::IncluderInterface {
 
 }  // namespace compiler
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_COMPILER_INCLUDER_H_

engine/src/flutter/impeller/compiler/logger.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_COMPILER_LOGGER_H_
+#define FLUTTER_IMPELLER_COMPILER_LOGGER_H_
 
 #include <sstream>
 #include <string>
@@ -43,3 +44,5 @@ class AutoLogger {
 
 }  // namespace compiler
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_COMPILER_LOGGER_H_

engine/src/flutter/impeller/compiler/reflector.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_COMPILER_REFLECTOR_H_
+#define FLUTTER_IMPELLER_COMPILER_REFLECTOR_H_
 
 #include <cstdint>
 #include <memory>
@@ -177,3 +178,5 @@ class Reflector {
 
 }  // namespace compiler
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_COMPILER_REFLECTOR_H_

engine/src/flutter/impeller/compiler/runtime_stage_data.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_COMPILER_RUNTIME_STAGE_DATA_H_
+#define FLUTTER_IMPELLER_COMPILER_RUNTIME_STAGE_DATA_H_
 
 #include <memory>
 #include <vector>
@@ -58,3 +59,5 @@ class RuntimeStageData {
 
 }  // namespace compiler
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_COMPILER_RUNTIME_STAGE_DATA_H_

engine/src/flutter/impeller/compiler/source_options.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_COMPILER_SOURCE_OPTIONS_H_
+#define FLUTTER_IMPELLER_COMPILER_SOURCE_OPTIONS_H_
 
 #include <cstdint>
 #include <memory>
@@ -48,3 +49,5 @@ struct SourceOptions {
 
 }  // namespace compiler
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_COMPILER_SOURCE_OPTIONS_H_

engine/src/flutter/impeller/compiler/spirv_compiler.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_COMPILER_SPIRV_COMPILER_H_
+#define FLUTTER_IMPELLER_COMPILER_SPIRV_COMPILER_H_
 
 #include <cstdint>
 #include <vector>
@@ -75,3 +76,5 @@ class SPIRVCompiler {
 
 }  // namespace compiler
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_COMPILER_SPIRV_COMPILER_H_

engine/src/flutter/impeller/compiler/spirv_sksl.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_COMPILER_SPIRV_SKSL_H_
+#define FLUTTER_IMPELLER_COMPILER_SPIRV_SKSL_H_
 
 #include <cstdint>
 #include <memory>
@@ -78,3 +79,5 @@ class CompilerSkSL : public spirv_cross::CompilerGLSL {
 
 }  // namespace compiler
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_COMPILER_SPIRV_SKSL_H_

engine/src/flutter/impeller/compiler/switches.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_COMPILER_SWITCHES_H_
+#define FLUTTER_IMPELLER_COMPILER_SWITCHES_H_
 
 #include <cstdint>
 #include <iostream>
@@ -52,3 +53,5 @@ struct Switches {
 
 }  // namespace compiler
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_COMPILER_SWITCHES_H_

engine/src/flutter/impeller/compiler/types.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_COMPILER_TYPES_H_
+#define FLUTTER_IMPELLER_COMPILER_TYPES_H_
 
 #include <codecvt>
 #include <locale>
@@ -79,3 +80,5 @@ spirv_cross::CompilerMSL::Options::Platform TargetPlatformToMSLPlatform(
 
 }  // namespace compiler
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_COMPILER_TYPES_H_

engine/src/flutter/impeller/compiler/uniform_sorter.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_COMPILER_UNIFORM_SORTER_H_
+#define FLUTTER_IMPELLER_COMPILER_UNIFORM_SORTER_H_
 
 #include <optional>
 
@@ -25,3 +26,5 @@ std::vector<spirv_cross::ID> SortUniforms(
     bool include = true);
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_COMPILER_UNIFORM_SORTER_H_

engine/src/flutter/impeller/compiler/utilities.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_COMPILER_UTILITIES_H_
+#define FLUTTER_IMPELLER_COMPILER_UTILITIES_H_
 
 #include <filesystem>
 #include <string>
@@ -31,3 +32,5 @@ bool StringStartsWith(const std::string& target, const std::string& prefix);
 
 }  // namespace compiler
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_COMPILER_UTILITIES_H_

engine/src/flutter/impeller/core/allocator.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_CORE_ALLOCATOR_H_
+#define FLUTTER_IMPELLER_CORE_ALLOCATOR_H_
 
 #include "flutter/fml/mapping.h"
 #include "impeller/core/device_buffer_descriptor.h"
@@ -63,3 +64,5 @@ class Allocator {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_CORE_ALLOCATOR_H_

engine/src/flutter/impeller/core/buffer.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_CORE_BUFFER_H_
+#define FLUTTER_IMPELLER_CORE_BUFFER_H_
 
 #include <memory>
 
@@ -20,3 +21,5 @@ class Buffer {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_CORE_BUFFER_H_

engine/src/flutter/impeller/core/buffer_view.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_CORE_BUFFER_VIEW_H_
+#define FLUTTER_IMPELLER_CORE_BUFFER_VIEW_H_
 
 #include "impeller/core/buffer.h"
 #include "impeller/core/range.h"
@@ -18,3 +19,5 @@ struct BufferView {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_CORE_BUFFER_VIEW_H_

engine/src/flutter/impeller/core/capture.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_CORE_CAPTURE_H_
+#define FLUTTER_IMPELLER_CORE_CAPTURE_H_
 
 #include <functional>
 #include <initializer_list>
@@ -295,3 +296,5 @@ class CaptureContext {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_CORE_CAPTURE_H_

engine/src/flutter/impeller/core/device_buffer.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_CORE_DEVICE_BUFFER_H_
+#define FLUTTER_IMPELLER_CORE_DEVICE_BUFFER_H_
 
 #include <memory>
 #include <string>
@@ -60,3 +61,5 @@ class DeviceBuffer : public Buffer,
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_CORE_DEVICE_BUFFER_H_

engine/src/flutter/impeller/core/device_buffer_descriptor.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_CORE_DEVICE_BUFFER_DESCRIPTOR_H_
+#define FLUTTER_IMPELLER_CORE_DEVICE_BUFFER_DESCRIPTOR_H_
 
 #include <cstddef>
 
@@ -16,3 +17,5 @@ struct DeviceBufferDescriptor {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_CORE_DEVICE_BUFFER_DESCRIPTOR_H_

engine/src/flutter/impeller/core/formats.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_CORE_FORMATS_H_
+#define FLUTTER_IMPELLER_CORE_FORMATS_H_
 
 #include <cstdint>
 #include <functional>
@@ -679,3 +680,5 @@ struct hash<impeller::StencilAttachmentDescriptor> {
 };
 
 }  // namespace std
+
+#endif  // FLUTTER_IMPELLER_CORE_FORMATS_H_

engine/src/flutter/impeller/core/host_buffer.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_CORE_HOST_BUFFER_H_
+#define FLUTTER_IMPELLER_CORE_HOST_BUFFER_H_
 
 #include <algorithm>
 #include <memory>
@@ -162,3 +163,5 @@ class HostBuffer final : public Buffer {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_CORE_HOST_BUFFER_H_

engine/src/flutter/impeller/core/platform.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_CORE_PLATFORM_H_
+#define FLUTTER_IMPELLER_CORE_PLATFORM_H_
 
 #include <cstddef>
 
@@ -20,3 +21,5 @@ constexpr size_t DefaultUniformAlignment() {
 }
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_CORE_PLATFORM_H_

engine/src/flutter/impeller/core/range.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_CORE_RANGE_H_
+#define FLUTTER_IMPELLER_CORE_RANGE_H_
 
 #include <cstddef>
 
@@ -25,3 +26,5 @@ struct Range {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_CORE_RANGE_H_

engine/src/flutter/impeller/core/resource_binder.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_CORE_RESOURCE_BINDER_H_
+#define FLUTTER_IMPELLER_CORE_RESOURCE_BINDER_H_
 
 #include <memory>
 
@@ -35,3 +36,5 @@ struct ResourceBinder {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_CORE_RESOURCE_BINDER_H_

engine/src/flutter/impeller/core/runtime_types.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_CORE_RUNTIME_TYPES_H_
+#define FLUTTER_IMPELLER_CORE_RUNTIME_TYPES_H_
 
 #include <cstddef>
 #include <optional>
@@ -50,3 +51,5 @@ struct RuntimeUniformDescription {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_CORE_RUNTIME_TYPES_H_

engine/src/flutter/impeller/core/sampler.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_CORE_SAMPLER_H_
+#define FLUTTER_IMPELLER_CORE_SAMPLER_H_
 
 #include <unordered_map>
 
@@ -36,3 +37,5 @@ using SamplerMap = std::unordered_map<SamplerDescriptor,
                                       ComparableEqual<SamplerDescriptor>>;
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_CORE_SAMPLER_H_

engine/src/flutter/impeller/core/sampler_descriptor.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_CORE_SAMPLER_DESCRIPTOR_H_
+#define FLUTTER_IMPELLER_CORE_SAMPLER_DESCRIPTOR_H_
 
 #include "impeller/base/comparable.h"
 #include "impeller/core/formats.h"
@@ -47,3 +48,5 @@ struct SamplerDescriptor final : public Comparable<SamplerDescriptor> {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_CORE_SAMPLER_DESCRIPTOR_H_

engine/src/flutter/impeller/core/shader_types.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_CORE_SHADER_TYPES_H_
+#define FLUTTER_IMPELLER_CORE_SHADER_TYPES_H_
 
 #include <cstddef>
 #include <cstdint>
@@ -185,3 +186,5 @@ inline constexpr Vector4 ToVector(Color color) {
 }
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_CORE_SHADER_TYPES_H_

engine/src/flutter/impeller/core/texture.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_CORE_TEXTURE_H_
+#define FLUTTER_IMPELLER_CORE_TEXTURE_H_
 
 #include <string_view>
 
@@ -73,3 +74,5 @@ class Texture {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_CORE_TEXTURE_H_

engine/src/flutter/impeller/core/texture_descriptor.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_CORE_TEXTURE_DESCRIPTOR_H_
+#define FLUTTER_IMPELLER_CORE_TEXTURE_DESCRIPTOR_H_
 
 #include "impeller/core/formats.h"
 #include "impeller/geometry/size.h"
@@ -89,3 +90,5 @@ struct TextureDescriptor {
 std::string TextureDescriptorToString(const TextureDescriptor& desc);
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_CORE_TEXTURE_DESCRIPTOR_H_

engine/src/flutter/impeller/core/vertex_buffer.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_CORE_VERTEX_BUFFER_H_
+#define FLUTTER_IMPELLER_CORE_VERTEX_BUFFER_H_
 
 #include "impeller/core/buffer_view.h"
 #include "impeller/core/formats.h"
@@ -34,3 +35,5 @@ struct VertexBuffer {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_CORE_VERTEX_BUFFER_H_

engine/src/flutter/impeller/display_list/dl_dispatcher.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_DISPLAY_LIST_DL_DISPATCHER_H_
+#define FLUTTER_IMPELLER_DISPLAY_LIST_DL_DISPATCHER_H_
 
 #include "flutter/display_list/dl_op_receiver.h"
 #include "impeller/aiks/canvas_type.h"
@@ -235,3 +236,5 @@ class DlDispatcher final : public flutter::DlOpReceiver {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_DISPLAY_LIST_DL_DISPATCHER_H_

engine/src/flutter/impeller/display_list/dl_image_impeller.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_DISPLAY_LIST_DL_IMAGE_IMPELLER_H_
+#define FLUTTER_IMPELLER_DISPLAY_LIST_DL_IMAGE_IMPELLER_H_
 
 #include "flutter/display_list/image/dl_image.h"
 #include "impeller/core/texture.h"
@@ -63,3 +64,5 @@ class DlImageImpeller final : public flutter::DlImage {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_DISPLAY_LIST_DL_IMAGE_IMPELLER_H_

engine/src/flutter/impeller/display_list/dl_playground.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_DISPLAY_LIST_DL_PLAYGROUND_H_
+#define FLUTTER_IMPELLER_DISPLAY_LIST_DL_PLAYGROUND_H_
 
 #include "flutter/display_list/display_list.h"
 #include "flutter/display_list/dl_builder.h"
@@ -37,3 +38,5 @@ class DlPlayground : public PlaygroundTest {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_DISPLAY_LIST_DL_PLAYGROUND_H_

engine/src/flutter/impeller/display_list/dl_vertices_geometry.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_DISPLAY_LIST_DL_VERTICES_GEOMETRY_H_
+#define FLUTTER_IMPELLER_DISPLAY_LIST_DL_VERTICES_GEOMETRY_H_
 
 #include "flutter/display_list/dl_vertices.h"
 
@@ -14,3 +15,5 @@ std::shared_ptr<VerticesGeometry> MakeVertices(
     const flutter::DlVertices* vertices);
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_DISPLAY_LIST_DL_VERTICES_GEOMETRY_H_

engine/src/flutter/impeller/display_list/nine_patch_converter.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_DISPLAY_LIST_NINE_PATCH_CONVERTER_H_
+#define FLUTTER_IMPELLER_DISPLAY_LIST_NINE_PATCH_CONVERTER_H_
 
 #include <memory>
 
@@ -43,3 +44,5 @@ class NinePatchConverter {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_DISPLAY_LIST_NINE_PATCH_CONVERTER_H_

engine/src/flutter/impeller/display_list/skia_conversions.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_DISPLAY_LIST_SKIA_CONVERSIONS_H_
+#define FLUTTER_IMPELLER_DISPLAY_LIST_SKIA_CONVERSIONS_H_
 
 #include "display_list/dl_color.h"
 #include "display_list/effects/dl_color_source.h"
@@ -70,3 +71,5 @@ void ConvertStops(const flutter::DlGradientColorSourceBase* gradient,
 
 }  // namespace skia_conversions
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_DISPLAY_LIST_SKIA_CONVERSIONS_H_

engine/src/flutter/impeller/entity/contents/anonymous_contents.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_ENTITY_CONTENTS_ANONYMOUS_CONTENTS_H_
+#define FLUTTER_IMPELLER_ENTITY_CONTENTS_ANONYMOUS_CONTENTS_H_
 
 #include <functional>
 #include <memory>
@@ -40,3 +41,5 @@ class AnonymousContents final : public Contents {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_ENTITY_CONTENTS_ANONYMOUS_CONTENTS_H_

engine/src/flutter/impeller/entity/contents/atlas_contents.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_ENTITY_CONTENTS_ATLAS_CONTENTS_H_
+#define FLUTTER_IMPELLER_ENTITY_CONTENTS_ATLAS_CONTENTS_H_
 
 #include <functional>
 #include <memory>
@@ -161,3 +162,5 @@ class AtlasColorContents final : public Contents {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_ENTITY_CONTENTS_ATLAS_CONTENTS_H_

engine/src/flutter/impeller/entity/contents/checkerboard_contents.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_ENTITY_CONTENTS_CHECKERBOARD_CONTENTS_H_
+#define FLUTTER_IMPELLER_ENTITY_CONTENTS_CHECKERBOARD_CONTENTS_H_
 
 #include "impeller/entity/contents/contents.h"
 
@@ -40,3 +41,5 @@ class CheckerboardContents final : public Contents {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_ENTITY_CONTENTS_CHECKERBOARD_CONTENTS_H_

engine/src/flutter/impeller/entity/contents/clip_contents.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_ENTITY_CONTENTS_CLIP_CONTENTS_H_
+#define FLUTTER_IMPELLER_ENTITY_CONTENTS_CLIP_CONTENTS_H_
 
 #include <functional>
 #include <memory>
@@ -100,3 +101,5 @@ class ClipRestoreContents final : public Contents {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_ENTITY_CONTENTS_CLIP_CONTENTS_H_

engine/src/flutter/impeller/entity/contents/color_source_contents.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_ENTITY_CONTENTS_COLOR_SOURCE_CONTENTS_H_
+#define FLUTTER_IMPELLER_ENTITY_CONTENTS_COLOR_SOURCE_CONTENTS_H_
 
 #include "flutter/fml/macros.h"
 #include "impeller/entity/contents/contents.h"
@@ -113,3 +114,5 @@ class ColorSourceContents : public Contents {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_ENTITY_CONTENTS_COLOR_SOURCE_CONTENTS_H_

engine/src/flutter/impeller/entity/contents/conical_gradient_contents.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_ENTITY_CONTENTS_CONICAL_GRADIENT_CONTENTS_H_
+#define FLUTTER_IMPELLER_ENTITY_CONTENTS_CONICAL_GRADIENT_CONTENTS_H_
 
 #include <functional>
 #include <memory>
@@ -70,3 +71,5 @@ class ConicalGradientContents final : public ColorSourceContents {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_ENTITY_CONTENTS_CONICAL_GRADIENT_CONTENTS_H_

engine/src/flutter/impeller/entity/contents/content_context.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_ENTITY_CONTENTS_CONTENT_CONTEXT_H_
+#define FLUTTER_IMPELLER_ENTITY_CONTENTS_CONTENT_CONTEXT_H_
 
 #include <initializer_list>
 #include <memory>
@@ -909,3 +910,5 @@ class ContentContext {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_ENTITY_CONTENTS_CONTENT_CONTEXT_H_

engine/src/flutter/impeller/entity/contents/contents.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_ENTITY_CONTENTS_CONTENTS_H_
+#define FLUTTER_IMPELLER_ENTITY_CONTENTS_CONTENTS_H_
 
 #include <functional>
 #include <memory>
@@ -201,3 +202,5 @@ class Contents {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_ENTITY_CONTENTS_CONTENTS_H_

engine/src/flutter/impeller/entity/contents/filters/blend_filter_contents.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_ENTITY_CONTENTS_FILTERS_BLEND_FILTER_CONTENTS_H_
+#define FLUTTER_IMPELLER_ENTITY_CONTENTS_FILTERS_BLEND_FILTER_CONTENTS_H_
 
 #include <optional>
 #include "impeller/entity/contents/filters/color_filter_contents.h"
@@ -101,3 +102,5 @@ class BlendFilterContents : public ColorFilterContents {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_ENTITY_CONTENTS_FILTERS_BLEND_FILTER_CONTENTS_H_

engine/src/flutter/impeller/entity/contents/filters/border_mask_blur_filter_contents.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_ENTITY_CONTENTS_FILTERS_BORDER_MASK_BLUR_FILTER_CONTENTS_H_
+#define FLUTTER_IMPELLER_ENTITY_CONTENTS_FILTERS_BORDER_MASK_BLUR_FILTER_CONTENTS_H_
 
 #include <memory>
 #include <optional>
@@ -56,3 +57,5 @@ class BorderMaskBlurFilterContents final : public FilterContents {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_ENTITY_CONTENTS_FILTERS_BORDER_MASK_BLUR_FILTER_CONTENTS_H_

engine/src/flutter/impeller/entity/contents/filters/color_filter_contents.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_ENTITY_CONTENTS_FILTERS_COLOR_FILTER_CONTENTS_H_
+#define FLUTTER_IMPELLER_ENTITY_CONTENTS_FILTERS_COLOR_FILTER_CONTENTS_H_
 
 #include "impeller/entity/contents/filters/filter_contents.h"
 
@@ -59,3 +60,5 @@ class ColorFilterContents : public FilterContents {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_ENTITY_CONTENTS_FILTERS_COLOR_FILTER_CONTENTS_H_

engine/src/flutter/impeller/entity/contents/filters/color_matrix_filter_contents.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_ENTITY_CONTENTS_FILTERS_COLOR_MATRIX_FILTER_CONTENTS_H_
+#define FLUTTER_IMPELLER_ENTITY_CONTENTS_FILTERS_COLOR_MATRIX_FILTER_CONTENTS_H_
 
 #include <memory>
 #include <optional>
@@ -41,3 +42,5 @@ class ColorMatrixFilterContents final : public ColorFilterContents {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_ENTITY_CONTENTS_FILTERS_COLOR_MATRIX_FILTER_CONTENTS_H_

engine/src/flutter/impeller/entity/contents/filters/directional_gaussian_blur_filter_contents.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_ENTITY_CONTENTS_FILTERS_DIRECTIONAL_GAUSSIAN_BLUR_FILTER_CONTENTS_H_
+#define FLUTTER_IMPELLER_ENTITY_CONTENTS_FILTERS_DIRECTIONAL_GAUSSIAN_BLUR_FILTER_CONTENTS_H_
 
 #include <memory>
 #include <optional>
@@ -104,3 +105,5 @@ class DirectionalGaussianBlurFilterContents final : public FilterContents {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_ENTITY_CONTENTS_FILTERS_DIRECTIONAL_GAUSSIAN_BLUR_FILTER_CONTENTS_H_

engine/src/flutter/impeller/entity/contents/filters/filter_contents.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_ENTITY_CONTENTS_FILTERS_FILTER_CONTENTS_H_
+#define FLUTTER_IMPELLER_ENTITY_CONTENTS_FILTERS_FILTER_CONTENTS_H_
 
 #include <memory>
 #include <optional>
@@ -239,3 +240,5 @@ class FilterContents : public Contents {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_ENTITY_CONTENTS_FILTERS_FILTER_CONTENTS_H_

engine/src/flutter/impeller/entity/contents/filters/gaussian_blur_filter_contents.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_ENTITY_CONTENTS_FILTERS_GAUSSIAN_BLUR_FILTER_CONTENTS_H_
+#define FLUTTER_IMPELLER_ENTITY_CONTENTS_FILTERS_GAUSSIAN_BLUR_FILTER_CONTENTS_H_
 
 #include <optional>
 #include "impeller/entity/contents/filters/filter_contents.h"
@@ -71,3 +72,5 @@ class GaussianBlurFilterContents final : public FilterContents {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_ENTITY_CONTENTS_FILTERS_GAUSSIAN_BLUR_FILTER_CONTENTS_H_

engine/src/flutter/impeller/entity/contents/filters/inputs/contents_filter_input.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_ENTITY_CONTENTS_FILTERS_INPUTS_CONTENTS_FILTER_INPUT_H_
+#define FLUTTER_IMPELLER_ENTITY_CONTENTS_FILTERS_INPUTS_CONTENTS_FILTER_INPUT_H_
 
 #include "impeller/entity/contents/filters/inputs/filter_input.h"
 
@@ -41,3 +42,5 @@ class ContentsFilterInput final : public FilterInput {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_ENTITY_CONTENTS_FILTERS_INPUTS_CONTENTS_FILTER_INPUT_H_

engine/src/flutter/impeller/entity/contents/filters/inputs/filter_contents_filter_input.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_ENTITY_CONTENTS_FILTERS_INPUTS_FILTER_CONTENTS_FILTER_INPUT_H_
+#define FLUTTER_IMPELLER_ENTITY_CONTENTS_FILTERS_INPUTS_FILTER_CONTENTS_FILTER_INPUT_H_
 
 #include "impeller/entity/contents/filters/inputs/filter_input.h"
 
@@ -66,3 +67,5 @@ class FilterContentsFilterInput final : public FilterInput {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_ENTITY_CONTENTS_FILTERS_INPUTS_FILTER_CONTENTS_FILTER_INPUT_H_

engine/src/flutter/impeller/entity/contents/filters/inputs/filter_input.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_ENTITY_CONTENTS_FILTERS_INPUTS_FILTER_INPUT_H_
+#define FLUTTER_IMPELLER_ENTITY_CONTENTS_FILTERS_INPUTS_FILTER_INPUT_H_
 
 #include <memory>
 #include <optional>
@@ -92,3 +93,5 @@ class FilterInput {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_ENTITY_CONTENTS_FILTERS_INPUTS_FILTER_INPUT_H_

engine/src/flutter/impeller/entity/contents/filters/inputs/placeholder_filter_input.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_ENTITY_CONTENTS_FILTERS_INPUTS_PLACEHOLDER_FILTER_INPUT_H_
+#define FLUTTER_IMPELLER_ENTITY_CONTENTS_FILTERS_INPUTS_PLACEHOLDER_FILTER_INPUT_H_
 
 #include "impeller/entity/contents/filters/inputs/filter_input.h"
 
@@ -39,3 +40,5 @@ class PlaceholderFilterInput final : public FilterInput {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_ENTITY_CONTENTS_FILTERS_INPUTS_PLACEHOLDER_FILTER_INPUT_H_

engine/src/flutter/impeller/entity/contents/filters/inputs/texture_filter_input.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_ENTITY_CONTENTS_FILTERS_INPUTS_TEXTURE_FILTER_INPUT_H_
+#define FLUTTER_IMPELLER_ENTITY_CONTENTS_FILTERS_INPUTS_TEXTURE_FILTER_INPUT_H_
 
 #include "impeller/entity/contents/filters/inputs/filter_input.h"
 
@@ -41,3 +42,5 @@ class TextureFilterInput final : public FilterInput {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_ENTITY_CONTENTS_FILTERS_INPUTS_TEXTURE_FILTER_INPUT_H_

engine/src/flutter/impeller/entity/contents/filters/linear_to_srgb_filter_contents.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_ENTITY_CONTENTS_FILTERS_LINEAR_TO_SRGB_FILTER_CONTENTS_H_
+#define FLUTTER_IMPELLER_ENTITY_CONTENTS_FILTERS_LINEAR_TO_SRGB_FILTER_CONTENTS_H_
 
 #include "impeller/entity/contents/filters/color_filter_contents.h"
 #include "impeller/entity/contents/filters/inputs/filter_input.h"
@@ -32,3 +33,5 @@ class LinearToSrgbFilterContents final : public ColorFilterContents {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_ENTITY_CONTENTS_FILTERS_LINEAR_TO_SRGB_FILTER_CONTENTS_H_

engine/src/flutter/impeller/entity/contents/filters/local_matrix_filter_contents.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_ENTITY_CONTENTS_FILTERS_LOCAL_MATRIX_FILTER_CONTENTS_H_
+#define FLUTTER_IMPELLER_ENTITY_CONTENTS_FILTERS_LOCAL_MATRIX_FILTER_CONTENTS_H_
 
 #include "impeller/entity/contents/filters/filter_contents.h"
 #include "impeller/entity/contents/filters/inputs/filter_input.h"
@@ -44,3 +45,5 @@ class LocalMatrixFilterContents final : public FilterContents {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_ENTITY_CONTENTS_FILTERS_LOCAL_MATRIX_FILTER_CONTENTS_H_

engine/src/flutter/impeller/entity/contents/filters/matrix_filter_contents.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_ENTITY_CONTENTS_FILTERS_MATRIX_FILTER_CONTENTS_H_
+#define FLUTTER_IMPELLER_ENTITY_CONTENTS_FILTERS_MATRIX_FILTER_CONTENTS_H_
 
 #include "impeller/entity/contents/filters/filter_contents.h"
 #include "impeller/entity/contents/filters/inputs/filter_input.h"
@@ -56,3 +57,5 @@ class MatrixFilterContents final : public FilterContents {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_ENTITY_CONTENTS_FILTERS_MATRIX_FILTER_CONTENTS_H_

engine/src/flutter/impeller/entity/contents/filters/morphology_filter_contents.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_ENTITY_CONTENTS_FILTERS_MORPHOLOGY_FILTER_CONTENTS_H_
+#define FLUTTER_IMPELLER_ENTITY_CONTENTS_FILTERS_MORPHOLOGY_FILTER_CONTENTS_H_
 
 #include <memory>
 #include <optional>
@@ -56,3 +57,5 @@ class DirectionalMorphologyFilterContents final : public FilterContents {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_ENTITY_CONTENTS_FILTERS_MORPHOLOGY_FILTER_CONTENTS_H_