Fix failing transferToImageBitmap layout tests and commit pixel test on Mac

third_party/WebKit/Source/modules/webgl/WebGLRenderingContextBase.h

 /*
  * Copyright (C) 2009 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 428 matching lines @@
     friend class WebGLCompressedTextureS3TCsRGB;
     friend class WebGLRenderingContextErrorMessageCallback;
     friend class WebGLVertexArrayObjectBase;
     friend class ScopedTexture2DRestorer;
     friend class ScopedFramebufferRestorer;
     // To allow V8WebGL[2]RenderingContext to call visitChildDOMWrappers.
     friend class V8WebGLRenderingContext;
 
     WebGLRenderingContextBase(HTMLCanvasElement*, std::unique_ptr<WebGraphicsContext3DProvider>, const CanvasContextCreationAttributes&, unsigned);
     WebGLRenderingContextBase(OffscreenCanvas*, std::unique_ptr<WebGraphicsContext3DProvider>, const CanvasContextCreationAttributes&, unsigned);
-    PassRefPtr<DrawingBuffer> createDrawingBuffer(std::unique_ptr<WebGraphicsContext3DProvider>);
+    PassRefPtr<DrawingBuffer> createDrawingBuffer(std::unique_ptr<WebGraphicsContext3DProvider>, DrawingBuffer::ChromiumImageUsage);
     void setupFlags();
 
     // CanvasRenderingContext implementation.
     bool is3d() const override { return true; }
     bool isAccelerated() const override { return true; }
     void setIsHidden(bool) override;
     bool paintRenderingResultsToCanvas(SourceDrawingBuffer) override;
     WebLayer* platformLayer() const override;
     void stop() override;
 
@@ skipping 648 matching lines @@
     bool isPaintable() const final { return drawingBuffer(); }
 };
 
 DEFINE_TYPE_CASTS(WebGLRenderingContextBase, CanvasRenderingContext, context, context->is3d(), context.is3d());
 
 } // namespace blink
 
 WTF_ALLOW_MOVE_INIT_AND_COMPARE_WITH_MEM_FUNCTIONS(blink::WebGLRenderingContextBase::TextureUnitState);
 
 #endif // WebGLRenderingContextBase_h