Oilpan: move ImageData to the oilpan heap.

Source/core/html/HTMLCanvasElement.h

 /*
  * Copyright (C) 2004, 2006, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Alp Toker <alp@atoker.com>
  * 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 12 matching lines @@
  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef HTMLCanvasElement_h
 #define HTMLCanvasElement_h
 
 #include "core/html/HTMLElement.h"
 #include "core/html/canvas/CanvasImageSource.h"
+#include "heap/Handle.h"
 #include "platform/geometry/FloatRect.h"
 #include "platform/geometry/IntSize.h"
 #include "platform/graphics/Canvas2DLayerBridge.h"
 #include "platform/graphics/GraphicsTypes.h"
 #include "wtf/Forward.h"
 
 #define CanvasDefaultInterpolationQuality InterpolationLow
 
 namespace WebCore {
 
@@ skipping 62 matching lines @@
 
     GraphicsContext* drawingContext() const;
     GraphicsContext* existingDrawingContext() const;
 
     CanvasRenderingContext* renderingContext() const { return m_context.get(); }
 
     void ensureUnacceleratedImageBuffer();
     ImageBuffer* buffer() const;
     Image* copiedImage() const;
     void clearCopiedImage();
-    PassRefPtr<ImageData> getImageData();
+    PassRefPtrWillBeRawPtr<ImageData> getImageData();
     void makePresentationCopy();
     void clearPresentationCopy();
 
     SecurityOrigin* securityOrigin() const;
     bool originClean() const { return m_originClean; }
     void setOriginTainted() { m_originClean = false; }
 
     AffineTransform baseTransform() const;
 
     bool is3D() const;
@@ skipping 58 matching lines @@
     OwnPtr<ImageBuffer> m_imageBuffer;
     mutable OwnPtr<GraphicsContextStateSaver> m_contextStateSaver;
 
     mutable RefPtr<Image> m_presentedImage;
     mutable RefPtr<Image> m_copiedImage; // FIXME: This is temporary for platforms that have to copy the image buffer to render (and for CSSCanvasValue).
 };
 
 } //namespace
 
 #endif