Make ImageBitmap Transferable

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

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef ImageBitmap_h
 #define ImageBitmap_h
 
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "core/CoreExport.h"
 #include "core/html/HTMLImageElement.h"
@@ skipping 23 matching lines @@
 
     PassRefPtr<Image> bitmapImage() const;
     PassRefPtrWillBeRawPtr<HTMLImageElement> imageElement() const { return m_imageElement; }
 
     IntRect bitmapRect() const { return m_bitmapRect; }
 
     int width() const { return m_cropRect.width(); }
     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
     PassRefPtr<Image> getSourceImageForCanvas(SourceImageStatus*, AccelerationHint) const override;
     bool wouldTaintOrigin(SecurityOrigin*) const override { return false; }
     void adjustDrawRects(FloatRect* srcRect, FloatRect* dstRect) const override;
     FloatSize elementSize() const override;
 
     DECLARE_VIRTUAL_TRACE();
 
@@ skipping 15 matching lines @@
     RefPtr<Image> m_bitmap;
 
     IntRect m_bitmapRect; // The rect where the underlying Image should be placed in reference to the ImageBitmap.
     IntRect m_cropRect;
 
     // The offset by which the desired Image is stored internally.
     // ImageBitmaps constructed from HTMLImageElements reference the entire ImageResource and may have a non-zero bitmap offset.
     // 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
 
 #endif // ImageBitmap_h