Revert 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 393eabe78cdaf856ded22d97234cae7a78b389d7..bb45b3f009b97649d272ffb1158c13e864aee62a 100644
--- a/third_party/WebKit/Source/core/frame/ImageBitmap.cpp
+++ b/third_party/WebKit/Source/core/frame/ImageBitmap.cpp
@@ -181,21 +181,6 @@
     return adoptRefWillBeNoop(new ImageBitmap(image, normalizedCropRect));
 }
 
-PassRefPtrWillBeRawPtr<ImageBitmap> ImageBitmap::transfer()
-{
-    RefPtrWillBeRawPtr<ImageBitmap> bitmap = adoptRefWillBeNoop(new ImageBitmap(this, m_cropRect));
-    if (m_imageElement)
-        m_imageElement.clear();
-    if (m_bitmap)
-        m_bitmap.clear();
-    m_bitmapRect.setLocation(IntPoint(0, 0));
-    m_bitmapRect.setSize(IntSize(0, 0));
-    m_cropRect = m_bitmapRect;
-    m_bitmapOffset.setX(0);
-    m_bitmapOffset.setY(0);
-    return bitmap.release();
-}
-
 void ImageBitmap::notifyImageSourceChanged()
 {
     m_bitmap = cropImage(m_imageElement->cachedImage()->image(), m_cropRect);