Make ImageBitmap Transferable

third_party/WebKit/Source/core/frame/ImageBitmap.h

Index: third_party/WebKit/Source/core/frame/ImageBitmap.h
diff --git a/third_party/WebKit/Source/core/frame/ImageBitmap.h b/third_party/WebKit/Source/core/frame/ImageBitmap.h
index 8dc3a51e7070dd73fd00cf08973306fd253b6a49..37d29b51ebb00c00da0d9e9becc88e9c7df886e7 100644
--- a/third_party/WebKit/Source/core/frame/ImageBitmap.h
+++ b/third_party/WebKit/Source/core/frame/ImageBitmap.h
@@ -41,6 +41,10 @@ public:
     int height() const { return m_cropRect.height(); }
     IntSize size() const { return m_cropRect.size(); }
 
+    bool isNeutered() const { return m_isNeutered; }
+    void neuter();
+    PassRefPtr<ImageBitmap> transfer();

[Justin Novosad, 2015/10/23 13:30:04]

PassRefPtrWillBeRawPtr

+
     ~ImageBitmap() override;
 
     // CanvasImageSource implementation
@@ -76,6 +80,7 @@ private:
     // ImageBitmaps not constructed from HTMLImageElements always pre-crop and store the image at (0, 0).
     IntPoint m_bitmapOffset;
 
+    bool m_isNeutered;

[Justin Novosad, 2015/10/23 13:30:04]

Is this field necessary? I think isNeuteres can be implementes as "return
!m_bitmap && !m_imageElement"

 };
 
 } // namespace blink