Fixing performance issue of creating imagebitmap from ImageData

third_party/WebKit/Source/platform/graphics/ImageBuffer.cpp

 /*
  * Copyright (c) 2008, Google Inc. All rights reserved.
  * Copyright (C) 2009 Dirk Schulze <krit@webkit.org>
  * Copyright (C) 2010 Torch Mobile (Beijing) Co. Ltd. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
@@ skipping 49 matching lines @@
 
 namespace blink {
 
 PassOwnPtr<ImageBuffer> ImageBuffer::create(PassOwnPtr<ImageBufferSurface> surface)
 {
     if (!surface->isValid())
         return nullptr;
     return adoptPtr(new ImageBuffer(surface));
 }
 
-PassOwnPtr<ImageBuffer> ImageBuffer::create(const IntSize& size, OpacityMode opacityMode)
+PassOwnPtr<ImageBuffer> ImageBuffer::create(const IntSize& size, OpacityMode opacityMode, ImageInitializationMode initializationMode)
 {
-    OwnPtr<ImageBufferSurface> surface(adoptPtr(new UnacceleratedImageBufferSurface(size, opacityMode)));
+    OwnPtr<ImageBufferSurface> surface(adoptPtr(new UnacceleratedImageBufferSurface(size, opacityMode, initializationMode)));
     if (!surface->isValid())
         return nullptr;
     return adoptPtr(new ImageBuffer(surface.release()));
 }
 
 ImageBuffer::ImageBuffer(PassOwnPtr<ImageBufferSurface> surface)
     : m_snapshotState(InitialSnapshotState)
     , m_surface(surface)
     , m_client(0)
 {
@@ skipping 293 matching lines @@
     ASSERT(MIMETypeRegistry::isSupportedImageMIMETypeForEncoding(mimeType));
 
     Vector<char> encodedImage;
     if (!encodeImage(mimeType, quality, &encodedImage))
         return "data:,";
 
     return "data:" + mimeType + ";base64," + base64Encode(encodedImage);
 }
 
 } // namespace blink