Reland of: Make Imagebitmap Transferable

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

Index: third_party/WebKit/Source/core/frame/ImageBitmap.cpp
diff --git a/third_party/WebKit/Source/core/frame/ImageBitmap.cpp b/third_party/WebKit/Source/core/frame/ImageBitmap.cpp
index 137ab66a97f4e3ae3c1ab6d31e35407fb3659670..ddd4a86b58293da2028e6df44b9ecee79cf99221 100644
--- a/third_party/WebKit/Source/core/frame/ImageBitmap.cpp
+++ b/third_party/WebKit/Source/core/frame/ImageBitmap.cpp
@@ -106,6 +106,18 @@ ImageBitmap::ImageBitmap(Image* image, const IntRect& cropRect)
     m_image = cropImage(static_cast<StaticBitmapImage*>(image), cropRect);
 }
 
+ImageBitmap::ImageBitmap(PassRefPtr<StaticBitmapImage> image)
+{
+    m_image = image;
+}
+
+PassRefPtr<StaticBitmapImage> ImageBitmap::transfer()
+{
+    ASSERT(!isNeutered());
+    m_isNeutered = true;
+    return m_image.release();
+}
+
 ImageBitmap::~ImageBitmap()
 {
 }
@@ -146,6 +158,11 @@ PassRefPtrWillBeRawPtr<ImageBitmap> ImageBitmap::create(Image* image, const IntR
     return adoptRefWillBeNoop(new ImageBitmap(image, normalizedCropRect));
 }
 
+PassRefPtrWillBeRawPtr<ImageBitmap> ImageBitmap::create(PassRefPtr<StaticBitmapImage> image)
+{
+    return adoptRefWillBeNoop(new ImageBitmap(image));
+}
+
 unsigned long ImageBitmap::width() const
 {
     if (!m_image)