Streamline the presentation of ImageBitmapRenderingContext

third_party/WebKit/Source/core/html/canvas/CanvasRenderingContext.h

Index: third_party/WebKit/Source/core/html/canvas/CanvasRenderingContext.h
diff --git a/third_party/WebKit/Source/core/html/canvas/CanvasRenderingContext.h b/third_party/WebKit/Source/core/html/canvas/CanvasRenderingContext.h
index 6186c7fb4f96970c7bfb35630ae4827bcae6c621..2f04492ed86817a9fb7d4cbe5595588c3412f398 100644
--- a/third_party/WebKit/Source/core/html/canvas/CanvasRenderingContext.h
+++ b/third_party/WebKit/Source/core/html/canvas/CanvasRenderingContext.h
@@ -112,7 +112,8 @@ class CORE_EXPORT CanvasRenderingContext
                                      SnapshotReason) const = 0;
   virtual ImageData* toImageData(SnapshotReason reason) { return nullptr; }
   virtual ContextType getContextType() const = 0;
-  virtual bool isAccelerated() const { return false; }
+  virtual bool isComposited() const = 0;
+  virtual bool isAccelerated() const = 0;
   virtual bool shouldAntialias() const { return false; }
   virtual void setIsHidden(bool) = 0;
   virtual bool isContextLost() const { return true; }
@@ -122,6 +123,7 @@ class CORE_EXPORT CanvasRenderingContext
   }
   virtual bool isPaintable() const = 0;
   virtual void didDraw(const SkIRect& dirtyRect);
+  virtual void didDraw();
 
   // Return true if the content is updated.
   virtual bool paintRenderingResultsToCanvas(SourceDrawingBuffer) {
@@ -213,6 +215,7 @@ class CORE_EXPORT CanvasRenderingContext
 
  private:
   void dispose();
+  void scheduleFinalizeFrameIfNeeded();
 
   Member<HTMLCanvasElement> m_canvas;
   Member<OffscreenCanvas> m_offscreenCanvas;