[Impeller] re-remove wireframe. (#165929)

Easier just to re-open rather than fix diffs.

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

@@ -40,11 +40,6 @@ bool DlPlayground::OpenPlaygroundHere(DisplayListPlaygroundCallback callback) {
   }
   return Playground::OpenPlaygroundHere(
       [&context, &callback](RenderTarget& render_target) -> bool {
-        static bool wireframe = false;
-        if (ImGui::IsKeyPressed(ImGuiKey_Z)) {
-          wireframe = !wireframe;
-          context.GetContentContext().SetWireframe(wireframe);
-        }
         return RenderToTarget(
             context.GetContentContext(),  //
             render_target,                //

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

@@ -475,7 +475,7 @@ void ContentContextOptions::ApplyToPipelineDescriptor(
   }
 
   desc.SetPrimitiveType(primitive_type);
-  desc.SetPolygonMode(wireframe ? PolygonMode::kLine : PolygonMode::kFill);
+  desc.SetPolygonMode(PolygonMode::kFill);
 }
 
 std::array<std::vector<Scalar>, 15> GetPorterDuffSpecConstants(
@@ -913,10 +913,6 @@ const Capabilities& ContentContext::GetDeviceCapabilities() const {
   return *context_->GetCapabilities();
 }
 
-void ContentContext::SetWireframe(bool wireframe) {
-  wireframe_ = wireframe;
-}
-
 PipelineRef ContentContext::GetCachedRuntimeEffectPipeline(
     const std::string& unique_entrypoint_name,
     const ContentContextOptions& options,

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

@@ -97,7 +97,6 @@ struct ContentContextOptions {
   PixelFormat color_attachment_pixel_format = PixelFormat::kUnknown;
   bool has_depth_stencil_attachments = true;
   bool depth_write_enabled = false;
-  bool wireframe = false;
   bool is_for_rrect_blur_clear = false;
 
   constexpr uint64_t ToKey() const {
@@ -110,7 +109,7 @@ struct ContentContextOptions {
     static_assert(sizeof(color_attachment_pixel_format) == 1);
 
     return (is_for_rrect_blur_clear ? 1llu : 0llu) << 0 |
-           (wireframe ? 1llu : 0llu) << 1 |
+           (0) << 1 |  // // Unused, previously wireframe.
            (has_depth_stencil_attachments ? 1llu : 0llu) << 2 |
            (depth_write_enabled ? 1llu : 0llu) << 3 |
            // enums
@@ -240,8 +239,6 @@ class ContentContext {
 
   const Capabilities& GetDeviceCapabilities() const;
 
-  void SetWireframe(bool wireframe);
-
   using SubpassCallback =
       std::function<bool(const ContentContext&, RenderPass&)>;
 
@@ -343,7 +340,6 @@ class ContentContext {
   std::shared_ptr<RenderTargetAllocator> render_target_cache_;
   std::shared_ptr<HostBuffer> host_buffer_;
   std::shared_ptr<Texture> empty_texture_;
-  bool wireframe_ = false;
 
   ContentContext(const ContentContext&) = delete;
 

engine/src/flutter/impeller/entity/entity_playground.cc

@@ -53,11 +53,6 @@ bool EntityPlayground::OpenPlaygroundHere(EntityPlaygroundCallback callback) {
     return false;
   }
   SinglePassCallback pass_callback = [&](RenderPass& pass) -> bool {
-    static bool wireframe = false;
-    if (ImGui::IsKeyPressed(ImGuiKey_Z)) {
-      wireframe = !wireframe;
-      content_context.SetWireframe(wireframe);
-    }
     content_context.GetRenderTargetCache()->Start();
     bool result = callback(content_context, pass);
     content_context.GetRenderTargetCache()->End();