Use newImageSnapshot() to get an image from a Canvas

Source/platform/graphics/Image.h

 /*
  * Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2004, 2005, 2006 Apple Computer, Inc.  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.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 23 matching lines @@
 #include "platform/graphics/ImageOrientation.h"
 #include "platform/graphics/skia/NativeImageSkia.h"
 #include "third_party/skia/include/core/SkXfermode.h"
 #include "wtf/Assertions.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefCounted.h"
 #include "wtf/RefPtr.h"
 #include "wtf/RetainPtr.h"
 #include "wtf/text/WTFString.h"
 
+class SkImage;
+
 namespace blink {
 
 class FloatPoint;
 class FloatRect;
 class FloatSize;
 class GraphicsContext;
 class Length;
 class SharedBuffer;
 
 // This class gets notified when an image creates or destroys decoded frames and when it advances animation frames.
 class ImageObserver;
 
 class PLATFORM_EXPORT Image : public RefCounted<Image> {
     friend class GeneratedImage;
     friend class CrossfadeGeneratedImage;
     friend class GradientGeneratedImage;
     friend class GraphicsContext;
 
 public:
     virtual ~Image();
 
     static PassRefPtr<Image> loadPlatformResource(const char* name);
     static bool supportsType(const String&);
 
     virtual bool isSVGImage() const { return false; }
     virtual bool isBitmapImage() const { return false; }
     virtual bool currentFrameKnownToBeOpaque() = 0;
 
+    virtual PassRefPtr<SkImage> skImage();
+
     // Derived classes should override this if they can assure that the current
     // image frame contains only resources from its own security origin.
     virtual bool currentFrameHasSingleSecurityOrigin() const { return false; }
 
     static Image* nullImage();
     bool isNull() const { return size().isEmpty(); }
 
     virtual void setContainerSize(const IntSize&) { }
     virtual bool usesContainerSize() const { return false; }
     virtual bool hasRelativeWidth() const { return false; }
@@ skipping 63 matching lines @@
     RefPtr<SharedBuffer> m_encodedImageData;
     ImageObserver* m_imageObserver;
 };
 
 #define DEFINE_IMAGE_TYPE_CASTS(typeName) \
     DEFINE_TYPE_CASTS(typeName, Image, image, image->is##typeName(), image.is##typeName())
 
 } // namespace blink
 
 #endif