diff --git a/engine/src/flutter/examples/glfw/FlutterEmbedderGLFW.cc b/engine/src/flutter/examples/glfw/FlutterEmbedderGLFW.cc
index 92473c70c5..5389fb298d 100644
--- a/engine/src/flutter/examples/glfw/FlutterEmbedderGLFW.cc
+++ b/engine/src/flutter/examples/glfw/FlutterEmbedderGLFW.cc
@@ -1,7 +1,11 @@
+// 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.
 
 #include <assert.h>
 #include <embedder.h>
 #include <glfw3.h>
+
 #include <chrono>
 #include <iostream>
 
diff --git a/engine/src/flutter/examples/glfw/main.dart b/engine/src/flutter/examples/glfw/main.dart
index 1f2daa6fb1..4b8f5dde93 100644
--- a/engine/src/flutter/examples/glfw/main.dart
+++ b/engine/src/flutter/examples/glfw/main.dart
@@ -1,3 +1,7 @@
+// 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.
+
 import 'package:flutter/material.dart';
 import 'package:flutter/foundation.dart'
     show debugDefaultTargetPlatformOverride;
diff --git a/engine/src/flutter/flow/embedded_views.h b/engine/src/flutter/flow/embedded_views.h
index cbfde22878..a89d2cb3e0 100644
--- a/engine/src/flutter/flow/embedded_views.h
+++ b/engine/src/flutter/flow/embedded_views.h
@@ -1,7 +1,7 @@
 // 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.
-//
+
 #ifndef FLUTTER_FLOW_EMBEDDED_VIEWS_H_
 #define FLUTTER_FLOW_EMBEDDED_VIEWS_H_
 
diff --git a/engine/src/flutter/flow/flow_run_all_unittests.cc b/engine/src/flutter/flow/flow_run_all_unittests.cc
index a3a927c375..efa27a7433 100644
--- a/engine/src/flutter/flow/flow_run_all_unittests.cc
+++ b/engine/src/flutter/flow/flow_run_all_unittests.cc
@@ -1,7 +1,7 @@
 // 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.
-//
+
 #include "flutter/fml/build_config.h"
 #include "flutter/fml/command_line.h"
 #include "flutter/fml/logging.h"
diff --git a/engine/src/flutter/flow/flow_test_utils.cc b/engine/src/flutter/flow/flow_test_utils.cc
index 9b2abdf980..2e2bc5e483 100644
--- a/engine/src/flutter/flow/flow_test_utils.cc
+++ b/engine/src/flutter/flow/flow_test_utils.cc
@@ -1,7 +1,7 @@
 // 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.
-//
+
 #include <string>
 
 namespace flutter {
diff --git a/engine/src/flutter/flow/flow_test_utils.h b/engine/src/flutter/flow/flow_test_utils.h
index ec4300e70c..ed4ca287fe 100644
--- a/engine/src/flutter/flow/flow_test_utils.h
+++ b/engine/src/flutter/flow/flow_test_utils.h
@@ -1,7 +1,7 @@
 // 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.
-//
+
 #include <string>
 
 namespace flutter {
diff --git a/engine/src/flutter/flutter_frontend_server/bin/starter.dart b/engine/src/flutter/flutter_frontend_server/bin/starter.dart
index e95335c62f..27037aac5a 100644
--- a/engine/src/flutter/flutter_frontend_server/bin/starter.dart
+++ b/engine/src/flutter/flutter_frontend_server/bin/starter.dart
@@ -1,3 +1,7 @@
+// 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.
+
 // @dart=2.8
 library frontend_server;
 
diff --git a/engine/src/flutter/shell/common/shell_test_external_view_embedder.cc b/engine/src/flutter/shell/common/shell_test_external_view_embedder.cc
index 07557768a4..c26fbd2a17 100644
--- a/engine/src/flutter/shell/common/shell_test_external_view_embedder.cc
+++ b/engine/src/flutter/shell/common/shell_test_external_view_embedder.cc
@@ -1,3 +1,7 @@
+// 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.
+
 #include "shell_test_external_view_embedder.h"
 
 namespace flutter {
diff --git a/engine/src/flutter/shell/platform/android/apk_asset_provider.cc b/engine/src/flutter/shell/platform/android/apk_asset_provider.cc
index 7ffbf2b45a..9f52aa56bf 100644
--- a/engine/src/flutter/shell/platform/android/apk_asset_provider.cc
+++ b/engine/src/flutter/shell/platform/android/apk_asset_provider.cc
@@ -1,4 +1,9 @@
+// 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.
+
 #include <unistd.h>
+
 #include <algorithm>
 #include <sstream>
 
diff --git a/engine/src/flutter/shell/platform/common/cpp/client_wrapper/testing/stub_flutter_api.cc b/engine/src/flutter/shell/platform/common/cpp/client_wrapper/testing/stub_flutter_api.cc
index 7cdd354a4d..749f99c024 100644
--- a/engine/src/flutter/shell/platform/common/cpp/client_wrapper/testing/stub_flutter_api.cc
+++ b/engine/src/flutter/shell/platform/common/cpp/client_wrapper/testing/stub_flutter_api.cc
@@ -2,10 +2,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// 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.
-
 #include "flutter/shell/platform/common/cpp/client_wrapper/testing/stub_flutter_api.h"
 
 static flutter::testing::StubFlutterApi* s_stub_implementation;
diff --git a/engine/src/flutter/shell/platform/embedder/fixtures/main.dart b/engine/src/flutter/shell/platform/embedder/fixtures/main.dart
index 95c25aaefb..de4cf422b6 100644
--- a/engine/src/flutter/shell/platform/embedder/fixtures/main.dart
+++ b/engine/src/flutter/shell/platform/embedder/fixtures/main.dart
@@ -1,3 +1,7 @@
+// 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.
+
 import 'dart:async';
 import 'dart:typed_data';
 import 'dart:ui';
diff --git a/engine/src/flutter/shell/platform/windows/testing/mock_win32_window.cc b/engine/src/flutter/shell/platform/windows/testing/mock_win32_window.cc
index 01543df2d6..68e8e3f516 100644
--- a/engine/src/flutter/shell/platform/windows/testing/mock_win32_window.cc
+++ b/engine/src/flutter/shell/platform/windows/testing/mock_win32_window.cc
@@ -1,3 +1,7 @@
+// 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.
+
 #include "flutter/shell/platform/windows/testing/mock_win32_window.h"
 
 namespace flutter {
diff --git a/engine/src/flutter/shell/platform/windows/testing/win32_flutter_window_test.cc b/engine/src/flutter/shell/platform/windows/testing/win32_flutter_window_test.cc
index bae1d9cd8d..b514a96a57 100644
--- a/engine/src/flutter/shell/platform/windows/testing/win32_flutter_window_test.cc
+++ b/engine/src/flutter/shell/platform/windows/testing/win32_flutter_window_test.cc
@@ -1,3 +1,7 @@
+// 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.
+
 #include "flutter/shell/platform/windows/testing/win32_flutter_window_test.h"
 
 namespace flutter {
diff --git a/engine/src/flutter/shell/platform/windows/win32_dpi_utils.cc b/engine/src/flutter/shell/platform/windows/win32_dpi_utils.cc
index 8fe994c463..25e8b4a510 100644
--- a/engine/src/flutter/shell/platform/windows/win32_dpi_utils.cc
+++ b/engine/src/flutter/shell/platform/windows/win32_dpi_utils.cc
@@ -1,3 +1,7 @@
+// 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.
+
 #include "win32_dpi_utils.h"
 
 namespace flutter {
diff --git a/engine/src/flutter/shell/platform/windows/win32_flutter_window.cc b/engine/src/flutter/shell/platform/windows/win32_flutter_window.cc
index 42915f2535..c79e0a5364 100644
--- a/engine/src/flutter/shell/platform/windows/win32_flutter_window.cc
+++ b/engine/src/flutter/shell/platform/windows/win32_flutter_window.cc
@@ -1,3 +1,7 @@
+// 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.
+
 #include "flutter/shell/platform/windows/win32_flutter_window.h"
 
 #include <chrono>
diff --git a/engine/src/flutter/testing/dart/channel_buffers_test.dart b/engine/src/flutter/testing/dart/channel_buffers_test.dart
index 96047fb17a..a6d0152015 100644
--- a/engine/src/flutter/testing/dart/channel_buffers_test.dart
+++ b/engine/src/flutter/testing/dart/channel_buffers_test.dart
@@ -1,3 +1,7 @@
+// 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.
+
 // @dart = 2.6
 import 'dart:convert';
 import 'dart:typed_data';
diff --git a/engine/src/flutter/testing/dart/dart_test.dart b/engine/src/flutter/testing/dart/dart_test.dart
index 6f8467e4aa..97735d9113 100644
--- a/engine/src/flutter/testing/dart/dart_test.dart
+++ b/engine/src/flutter/testing/dart/dart_test.dart
@@ -1,4 +1,4 @@
-// Copyright 2013 The Chromium Authors. All rights reserved.
+// 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.
 
diff --git a/engine/src/flutter/testing/dart/image_filter_test.dart b/engine/src/flutter/testing/dart/image_filter_test.dart
index 8ba9351b47..fb0297bc3e 100644
--- a/engine/src/flutter/testing/dart/image_filter_test.dart
+++ b/engine/src/flutter/testing/dart/image_filter_test.dart
@@ -1,4 +1,4 @@
-// Copyright 2019 The Flutter Authors. All rights reserved.
+// 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.
 
diff --git a/engine/src/flutter/testing/dart/paragraph_test.dart b/engine/src/flutter/testing/dart/paragraph_test.dart
index 4a760d0be5..2f4ec6f6bc 100644
--- a/engine/src/flutter/testing/dart/paragraph_test.dart
+++ b/engine/src/flutter/testing/dart/paragraph_test.dart
@@ -1,4 +1,4 @@
-// Copyright 2013 The Chromium Authors. All rights reserved.
+// 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.
 
diff --git a/engine/src/flutter/testing/dart/semantics_test.dart b/engine/src/flutter/testing/dart/semantics_test.dart
index 4257b479b1..5a7146c01f 100644
--- a/engine/src/flutter/testing/dart/semantics_test.dart
+++ b/engine/src/flutter/testing/dart/semantics_test.dart
@@ -1,4 +1,4 @@
-// Copyright 2019 The Chromium Authors. All rights reserved.
+// 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.
 
diff --git a/engine/src/flutter/testing/dart/task_order_test.dart b/engine/src/flutter/testing/dart/task_order_test.dart
index 64aacf59ac..4bfd71702b 100644
--- a/engine/src/flutter/testing/dart/task_order_test.dart
+++ b/engine/src/flutter/testing/dart/task_order_test.dart
@@ -1,4 +1,4 @@
-// Copyright 2013 The Chromium Authors. All rights reserved.
+// 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.
 
diff --git a/engine/src/flutter/testing/dart/text_test.dart b/engine/src/flutter/testing/dart/text_test.dart
index 9b4798f15f..559aeef539 100644
--- a/engine/src/flutter/testing/dart/text_test.dart
+++ b/engine/src/flutter/testing/dart/text_test.dart
@@ -1,4 +1,4 @@
-// Copyright 2019 The Flutter Authors. All rights reserved.
+// 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.
 
diff --git a/engine/src/flutter/testing/scenario_app/lib/src/channel_util.dart b/engine/src/flutter/testing/scenario_app/lib/src/channel_util.dart
index 5f8c4c0d1d..986494f5ff 100644
--- a/engine/src/flutter/testing/scenario_app/lib/src/channel_util.dart
+++ b/engine/src/flutter/testing/scenario_app/lib/src/channel_util.dart
@@ -1,4 +1,4 @@
-// Copyright 2019 The Flutter Authors. All rights reserved.
+// 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.
 
diff --git a/engine/src/flutter/testing/scenario_app/lib/src/initial_route_reply.dart b/engine/src/flutter/testing/scenario_app/lib/src/initial_route_reply.dart
index d53a118e84..c42e7608da 100644
--- a/engine/src/flutter/testing/scenario_app/lib/src/initial_route_reply.dart
+++ b/engine/src/flutter/testing/scenario_app/lib/src/initial_route_reply.dart
@@ -1,4 +1,4 @@
-// Copyright 2019 The Flutter Authors. All rights reserved.
+// 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.
 
diff --git a/engine/src/flutter/testing/scenario_app/lib/src/locale_initialization.dart b/engine/src/flutter/testing/scenario_app/lib/src/locale_initialization.dart
index 8e48a91b7c..6157de30be 100644
--- a/engine/src/flutter/testing/scenario_app/lib/src/locale_initialization.dart
+++ b/engine/src/flutter/testing/scenario_app/lib/src/locale_initialization.dart
@@ -1,4 +1,4 @@
-// Copyright 2020 The Flutter Authors. All rights reserved.
+// 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.
 
diff --git a/engine/src/flutter/testing/scenario_app/lib/src/platform_echo_mixin.dart b/engine/src/flutter/testing/scenario_app/lib/src/platform_echo_mixin.dart
index fbd67338f5..2e735d86c6 100644
--- a/engine/src/flutter/testing/scenario_app/lib/src/platform_echo_mixin.dart
+++ b/engine/src/flutter/testing/scenario_app/lib/src/platform_echo_mixin.dart
@@ -1,4 +1,4 @@
-// Copyright 2019 The Flutter Authors. All rights reserved.
+// 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.
 
diff --git a/engine/src/flutter/testing/scenario_app/lib/src/poppable_screen.dart b/engine/src/flutter/testing/scenario_app/lib/src/poppable_screen.dart
index c2a1f91c71..6ecd655b02 100644
--- a/engine/src/flutter/testing/scenario_app/lib/src/poppable_screen.dart
+++ b/engine/src/flutter/testing/scenario_app/lib/src/poppable_screen.dart
@@ -1,4 +1,4 @@
-// Copyright 2019 The Flutter Authors. All rights reserved.
+// 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.
 
diff --git a/engine/src/flutter/testing/scenario_app/lib/src/send_text_focus_semantics.dart b/engine/src/flutter/testing/scenario_app/lib/src/send_text_focus_semantics.dart
index 9b5839212d..529dafcea5 100644
--- a/engine/src/flutter/testing/scenario_app/lib/src/send_text_focus_semantics.dart
+++ b/engine/src/flutter/testing/scenario_app/lib/src/send_text_focus_semantics.dart
@@ -1,4 +1,4 @@
-// Copyright 2020 The Flutter Authors. All rights reserved.
+// 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.
 
diff --git a/engine/src/flutter/testing/scenario_app/lib/src/touches_scenario.dart b/engine/src/flutter/testing/scenario_app/lib/src/touches_scenario.dart
index 7afcf030fc..dbbf50ff15 100644
--- a/engine/src/flutter/testing/scenario_app/lib/src/touches_scenario.dart
+++ b/engine/src/flutter/testing/scenario_app/lib/src/touches_scenario.dart
@@ -1,4 +1,4 @@
-// Copyright 2020 The Flutter Authors. All rights reserved.
+// 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.
 
diff --git a/engine/src/flutter/testing/symbols/verify_exported.dart b/engine/src/flutter/testing/symbols/verify_exported.dart
index 2bd2d236d0..0a26a3cf4b 100644
--- a/engine/src/flutter/testing/symbols/verify_exported.dart
+++ b/engine/src/flutter/testing/symbols/verify_exported.dart
@@ -1,3 +1,7 @@
+// 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.
+
 // @dart = 2.6
 import 'dart:convert';
 import 'dart:io';
diff --git a/engine/src/flutter/third_party/txt/src/txt/styled_runs.cc b/engine/src/flutter/third_party/txt/src/txt/styled_runs.cc
index 7c7ba75db5..aa39ef75d9 100644
--- a/engine/src/flutter/third_party/txt/src/txt/styled_runs.cc
+++ b/engine/src/flutter/third_party/txt/src/txt/styled_runs.cc
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2017 Google, Inc.
+ * Copyright 2017 Google Inc.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/engine/src/flutter/tools/const_finder/test/const_finder_test.dart b/engine/src/flutter/tools/const_finder/test/const_finder_test.dart
index e68146761b..0046660baf 100644
--- a/engine/src/flutter/tools/const_finder/test/const_finder_test.dart
+++ b/engine/src/flutter/tools/const_finder/test/const_finder_test.dart
@@ -132,7 +132,7 @@ void _checkNonConsts() {
         },
         <String, dynamic>{
           'file': 'file://$fixtures/pkg/package.dart',
-          'line': 10,
+          'line': 14,
           'column': 25,
         }
       ]
diff --git a/engine/src/flutter/tools/const_finder/test/fixtures/pkg/package.dart b/engine/src/flutter/tools/const_finder/test/fixtures/pkg/package.dart
index 62ba73c357..1b9d1eb255 100644
--- a/engine/src/flutter/tools/const_finder/test/fixtures/pkg/package.dart
+++ b/engine/src/flutter/tools/const_finder/test/fixtures/pkg/package.dart
@@ -1,3 +1,7 @@
+// 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.
+
 import 'package:const_finder_fixtures/target.dart';
 
 void createTargetInPackage() {
diff --git a/engine/src/flutter/tools/generate_package_config/bin/generate_from_legacy.dart b/engine/src/flutter/tools/generate_package_config/bin/generate_from_legacy.dart
index 011e5e11ba..f1a7d6e235 100644
--- a/engine/src/flutter/tools/generate_package_config/bin/generate_from_legacy.dart
+++ b/engine/src/flutter/tools/generate_package_config/bin/generate_from_legacy.dart
@@ -1,6 +1,7 @@
-// Copyright (c) 2020, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
+// 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.
+
 // @dart=2.8
 import 'dart:convert';
 import 'dart:io';