Remove support for -webkit-canvas and Document.getCSSCanvasContext.

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

Index: third_party/WebKit/Source/core/html/HTMLCanvasElement.h
diff --git a/third_party/WebKit/Source/core/html/HTMLCanvasElement.h b/third_party/WebKit/Source/core/html/HTMLCanvasElement.h
index f8b1b19abcd8ac856b20ee4c9e9f5132794baa76..d776e99cbb778ec3f99001e5cadb7b01318eeecf 100644
--- a/third_party/WebKit/Source/core/html/HTMLCanvasElement.h
+++ b/third_party/WebKit/Source/core/html/HTMLCanvasElement.h
@@ -82,9 +82,6 @@ public:
 
     static WebThread* getToBlobThreadInstance();
 
-    void addObserver(CanvasObserver*);
-    void removeObserver(CanvasObserver*);
-
     // Attributes and functions exposed to script
     int width() const { return size().width(); }
     int height() const { return size().height(); }
@@ -93,8 +90,6 @@ public:
 
     void setWidth(int);
     void setHeight(int);
-    void setAccelerationDisabled(bool accelerationDisabled) { m_accelerationDisabled = accelerationDisabled; }
-    bool accelerationDisabled() const { return m_accelerationDisabled; }
 
     void setSize(const IntSize& newSize)
     {
@@ -123,7 +118,6 @@ public:
 
     // Used for rendering
     void didDraw(const FloatRect&);
-    void notifyObserversCanvasChanged(const FloatRect&);

[Justin Novosad, 2015/10/23 18:21:12]

This was so fragile. Glad to see it go!

[chrishtr, 2015/10/23 19:47:06]

ACK!

 
     void paint(GraphicsContext*, const LayoutRect&);
 
@@ -220,14 +214,11 @@ private:
     static void encodeImageAsync(DOMUint8ClampedArray* imagedata, IntSize imageSize, FileCallback*, const String& mimeType, double quality);
     static void createBlobAndCall(PassOwnPtr<Vector<char>> encodedImage, const String& mimeType, FileCallback*);
 
-    WillBeHeapHashSet<RawPtrWillBeWeakMember<CanvasObserver>> m_observers;
-
     IntSize m_size;
 
     OwnPtrWillBeMember<CanvasRenderingContext> m_context;
 
     bool m_ignoreReset;
-    bool m_accelerationDisabled;
     FloatRect m_dirtyRect;
 
     mutable intptr_t m_externallyAllocatedMemory;