[NOT FOR COMMIT] Fully replace SkCanvas uses.

third_party/WebKit/Source/core/html/HTMLCanvasElement.h

 /*
  * Copyright (C) 2004, 2006, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Alp Toker <alp@atoker.com>
  * Copyright (C) 2010 Torch Mobile (Beijing) Co. Ltd. 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.
@@ skipping 117 matching lines @@
 
   // Used for canvas capture.
   void addListener(CanvasDrawListener*);
   void removeListener(CanvasDrawListener*);
 
   // Used for rendering
   void didDraw(const FloatRect&);
 
   void paint(GraphicsContext&, const LayoutRect&);
 
-  SkCanvas* drawingCanvas() const;
+  CdlCanvas* drawingCanvas() const;
   void disableDeferral(DisableDeferralReason) const;
-  SkCanvas* existingDrawingCanvas() const;
+  CdlCanvas* existingDrawingCanvas() const;
 
   CanvasRenderingContext* renderingContext() const { return m_context.get(); }
 
   void ensureUnacceleratedImageBuffer();
   ImageBuffer* buffer() const;
   PassRefPtr<Image> copiedImage(SourceDrawingBuffer, AccelerationHint) const;
   void clearCopiedImage();
 
   SecurityOrigin* getSecurityOrigin() const;
   bool originClean() const;
@@ skipping 32 matching lines @@
   bool isOpaque() const override;
   bool isAccelerated() const override;
   int sourceWidth() override { return m_size.width(); }
   int sourceHeight() override { return m_size.height(); }
 
   // ImageBufferClient implementation
   void notifySurfaceInvalid() override;
   bool isDirty() override { return !m_dirtyRect.isEmpty(); }
   void didDisableAcceleration() override;
   void didFinalizeFrame() override;
-  void restoreCanvasMatrixClipStack(SkCanvas*) const override;
+  void restoreCanvasMatrixClipStack(CdlCanvas*) const override;
 
   void doDeferredPaintInvalidation();
 
   // ImageBitmapSource implementation
   IntSize bitmapSourceSize() const override;
   ScriptPromise createImageBitmap(ScriptState*,
                                   EventTarget&,
                                   Optional<IntRect> cropRect,
                                   const ImageBitmapOptions&,
                                   ExceptionState&) override;
@@ skipping 100 matching lines @@
   // Used for OffscreenCanvas that controls this HTML canvas element
   std::unique_ptr<CanvasSurfaceLayerBridge> m_surfaceLayerBridge;
 
   int m_numFramesSinceLastRenderingModeSwitch;
   bool m_pendingRenderingModeSwitch;
 };
 
 }  // namespace blink
 
 #endif  // HTMLCanvasElement_h