Make OffscreenCanvas Transferable

third_party/WebKit/Source/modules/offscreencanvas/OffscreenCanvas.h

Index: third_party/WebKit/Source/modules/offscreencanvas/OffscreenCanvas.h
diff --git a/third_party/WebKit/Source/modules/offscreencanvas/OffscreenCanvas.h b/third_party/WebKit/Source/modules/offscreencanvas/OffscreenCanvas.h
index 3b285c6d5c391d61862fcdcd8d0661fe386bc7d5..275eb71a27f047f098b64858d22c61b0f92ea549 100644
--- a/third_party/WebKit/Source/modules/offscreencanvas/OffscreenCanvas.h
+++ b/third_party/WebKit/Source/modules/offscreencanvas/OffscreenCanvas.h
@@ -39,8 +39,10 @@ public:
 
     IntSize size() const { return m_size; }
     OffscreenCanvasRenderingContext2D* renderingContext() const;
-    void setAssociatedCanvas(HTMLCanvasElement* canvas) { m_canvas = canvas; }
-    HTMLCanvasElement* getAssociatedCanvas() const { return m_canvas; }
+    void setAssociatedCanvasId(int canvasId) { m_canvasId = canvasId; }
+    int getAssociatedCanvasId() const { return m_canvasId; }
+    bool isNeutered() const { return m_isNeutered; }
+    void setNeutered();
 
     static void registerRenderingContextFactory(PassOwnPtr<OffscreenCanvasRenderingContextFactory>);
 
@@ -54,8 +56,9 @@ private:
     static OffscreenCanvasRenderingContextFactory* getRenderingContextFactory(int);
 
     Member<OffscreenCanvasRenderingContext> m_context;
-    WeakMember<HTMLCanvasElement> m_canvas;
+    int m_canvasId;

[Justin Novosad, 2016/04/12 18:10:23]

This field needs an initial value since it is not set by the constructor.
Ideally it should be a named constant that is not a valid node id.

[xidachen, 2016/04/12 19:35:14]

This is actually initialized in the constructor. But it makes more sense to
initialize here.

     IntSize m_size;
+    bool m_isNeutered = false;
 };
 
 } // namespace blink