Merge 104501 - [chromium win] Creating lots of temporary canvas contexts will crash.

Source/WebCore/platform/graphics/ImageBuffer.h

 /*
  * Copyright (C) 2006 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2007, 2008, 2009 Apple Inc. All rights reserved.
  * 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
@@ skipping 41 matching lines @@
     class IntPoint;
     class IntRect;
 
     enum Multiply {
         Premultiplied,
         Unmultiplied
     };
 
     enum RenderingMode {
         Unaccelerated,
+        UnacceleratedNonPlatformBuffer, // Use plain memory allocation rather than platform API to allocate backing store.
         Accelerated
     };
     
     enum BackingStoreCopy {
         CopyBackingStore, // Guarantee subsequent draws don't affect the copy.
         DontCopyBackingStore // Subsequent draws may affect the copy.
     };
 
     class ImageBuffer {
         WTF_MAKE_NONCOPYABLE(ImageBuffer); WTF_MAKE_FAST_ALLOCATED;
@@ skipping 73 matching lines @@
         ImageBuffer(const IntSize&, ColorSpace, RenderingMode, bool& success);
     };
 
 #if USE(CG) || USE(SKIA)
     String ImageDataToDataURL(const ImageData&, const String& mimeType, const double* quality);
 #endif
 
 } // namespace WebCore
 
 #endif // ImageBuffer_h