Use newImageSnapshot() to get an image from a Canvas

Source/platform/graphics/Pattern.h

Index: Source/platform/graphics/Pattern.h
diff --git a/Source/platform/graphics/Pattern.h b/Source/platform/graphics/Pattern.h
index 5d533824d87433d0a2c4a30d60a539c7498ca606..a5ccc94c6019bed1254972e0545ae44b3a689212 100644
--- a/Source/platform/graphics/Pattern.h
+++ b/Source/platform/graphics/Pattern.h
@@ -32,6 +32,7 @@
 #include "SkShader.h"
 #include "platform/PlatformExport.h"
 #include "platform/graphics/Image.h"
+#include "platform/graphics/StaticBitmapImage.h"
 #include "platform/transforms/AffineTransform.h"
 
 #include "wtf/PassRefPtr.h"
@@ -40,35 +41,36 @@
 
 namespace WebCore {
 
-class AffineTransform;
-
 class PLATFORM_EXPORT Pattern : public RefCounted<Pattern> {
 public:
-    static PassRefPtr<Pattern> create(PassRefPtr<Image> tileImage, bool repeatX, bool repeatY)
-    {
-        return adoptRef(new Pattern(tileImage, repeatX, repeatY));
-    }
-    ~Pattern();
+    static PassRefPtr<Pattern> create(PassRefPtr<Image> tileImage, bool repeatX, bool repeatY);
+
+    virtual ~Pattern();
 
     SkShader* shader();
 
     void setPatternSpaceTransform(const AffineTransform& patternSpaceTransformation);
-    const AffineTransform& getPatternSpaceTransform() { return m_patternSpaceTransformation; };
+    const AffineTransform& getPatternSpaceTransform() { return m_patternSpaceTransformation; }
 
     bool repeatX() const { return m_repeatX; }
     bool repeatY() const { return m_repeatY; }
+protected:
+    virtual PassRefPtr<SkShader> createShader() = 0;
 
-private:
-    Pattern(PassRefPtr<Image>, bool repeatX, bool repeatY);
+    Pattern(bool repeatX, bool repeatY)
+        : m_repeatX(repeatX)
+        , m_repeatY(repeatY)
+        , m_externalMemoryAllocated(0) { }
 
-    RefPtr<NativeImageSkia> m_tileImage;
     bool m_repeatX;
     bool m_repeatY;
     AffineTransform m_patternSpaceTransformation;
-    RefPtr<SkShader> m_pattern;
     int m_externalMemoryAllocated;
+
+private:
+    RefPtr<SkShader> m_pattern;
 };
 
-} //namespace
+} // namespace
 
 #endif