NOT FOR LANDING Experiment with allocating SVGImageForContainer on demand

Source/core/svg/graphics/SVGImage.h

 /*
  * Copyright (C) 2006 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2009 Apple 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 37 matching lines @@
     {
         return adoptRef(new SVGImage(observer));
     }
 
     static bool isInSVGImage(const Node*);
 
     LayoutBox* embeddedContentBox() const;
 
     bool isSVGImage() const override { return true; }
     IntSize size() const override { return m_intrinsicSize; }
-    void setURL(const KURL& url) { m_url = url; }
 
     bool currentFrameHasSingleSecurityOrigin() const override;
 
     void startAnimation(CatchUpAnimation = CatchUp) override;
     void stopAnimation() override;
     void resetAnimation() override;
 
     // Advances an animated image. This will trigger an animation update for CSS
     // and advance the SMIL timeline by one frame.
     void advanceAnimationForTesting() override;
@@ skipping 29 matching lines @@
 
     // FIXME: SVGImages are underreporting decoded sizes and will be unable
     // to prune because these functions are not implemented yet.
     void destroyDecodedData(bool) override { }
 
     // FIXME: Implement this to be less conservative.
     bool currentFrameKnownToBeOpaque() override { return false; }
 
     SVGImage(ImageObserver*);
     void draw(SkCanvas*, const SkPaint&, const FloatRect& fromRect, const FloatRect& toRect, RespectImageOrientationEnum, ImageClampingMode) override;
-    void drawForContainer(SkCanvas*, const SkPaint&, const FloatSize, float, const FloatRect&, const FloatRect&);
+    void drawForContainer(SkCanvas*, const SkPaint&, const FloatSize, float, const FloatRect&, const FloatRect&, const KURL& urlWithFragment);
     void drawPatternForContainer(GraphicsContext*, const FloatSize, float, const FloatRect&, const FloatSize&, const FloatPoint&,
-        SkXfermode::Mode, const FloatRect&, const IntSize& repeatSpacing);
+        SkXfermode::Mode, const FloatRect&, const IntSize& repeatSpacing, const KURL& urlWithFragment);
+    void drawInternal(SkCanvas*, const SkPaint&, const FloatRect& fromRect, const FloatRect& toRect, RespectImageOrientationEnum, ImageClampingMode);
 
     OwnPtrWillBePersistent<SVGImageChromeClient> m_chromeClient;
     OwnPtrWillBePersistent<Page> m_page;
     IntSize m_intrinsicSize;
-    KURL m_url;
 };
 
 DEFINE_IMAGE_TYPE_CASTS(SVGImage);
 
 class ImageObserverDisabler {
     STACK_ALLOCATED();
     WTF_MAKE_NONCOPYABLE(ImageObserverDisabler);
 public:
     ImageObserverDisabler(Image* image)
         : m_image(image)
     {
         m_observer = m_image->imageObserver();
         m_image->setImageObserver(0);
     }
 
     ~ImageObserverDisabler()
     {
         m_image->setImageObserver(m_observer);
     }
 private:
     Image* m_image;
     ImageObserver* m_observer;
 };
 
 }
 
 #endif // SVGImage_h