Use newImageSnapshot() to get an image from a Canvas

Source/platform/graphics/Canvas2DLayerBridge.h

Index: Source/platform/graphics/Canvas2DLayerBridge.h
diff --git a/Source/platform/graphics/Canvas2DLayerBridge.h b/Source/platform/graphics/Canvas2DLayerBridge.h
index 3b93e43218888a143ab399bf878e258fa15f5bc3..31732573003ad7db6daf7f50999280379640fdb6 100644
--- a/Source/platform/graphics/Canvas2DLayerBridge.h
+++ b/Source/platform/graphics/Canvas2DLayerBridge.h
@@ -26,8 +26,6 @@
 #ifndef Canvas2DLayerBridge_h
 #define Canvas2DLayerBridge_h
 
-#include "SkDeferredCanvas.h"
-#include "SkImage.h"
 #include "platform/PlatformExport.h"
 #include "platform/geometry/IntSize.h"
 #include "platform/graphics/ImageBufferSurface.h"
@@ -35,6 +33,8 @@
 #include "public/platform/WebExternalTextureLayerClient.h"
 #include "public/platform/WebExternalTextureMailbox.h"
 #include "third_party/khronos/GLES2/gl2.h"
+#include "third_party/skia/include/core/SkImage.h"
+#include "third_party/skia/include/utils/SkDeferredCanvas.h"
 #include "wtf/DoublyLinkedList.h"
 #include "wtf/PassOwnPtr.h"
 #include "wtf/RefCounted.h"
@@ -91,6 +91,8 @@ public:
 
     void beginDestruction();
 
+    PassRefPtr<SkImage> newImageSnapshot();
+
 protected:
     Canvas2DLayerBridge(PassOwnPtr<WebGraphicsContext3DProvider>, PassOwnPtr<SkDeferredCanvas>, PassRefPtr<SkSurface>, int, OpacityMode);
     void setRateLimitingEnabled(bool);