Avoid calling imageForCurrentFrame needlessly on SVGImageForContainer

third_party/WebKit/Source/core/svg/graphics/SVGImageForContainer.h

 /*
  * Copyright (C) 2013 Google 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 26 matching lines @@
 class SVGImageForContainer final : public Image {
     USING_FAST_MALLOC(SVGImageForContainer);
 public:
     static PassRefPtr<SVGImageForContainer> create(SVGImage* image, const IntSize& containerSize, float zoom, const KURL& url)
     {
         FloatSize containerSizeWithoutZoom(containerSize);
         containerSizeWithoutZoom.scale(1 / zoom);
         return adoptRef(new SVGImageForContainer(image, containerSizeWithoutZoom, zoom, url));
     }
 
+    bool isTextureBacked() override;
     IntSize size() const override;
 
     bool usesContainerSize() const override { return m_image->usesContainerSize(); }
     bool hasRelativeWidth() const override { return m_image->hasRelativeWidth(); }
     bool hasRelativeHeight() const override { return m_image->hasRelativeHeight(); }
     void computeIntrinsicDimensions(Length& intrinsicWidth, Length& intrinsicHeight, FloatSize& intrinsicRatio) override
     {
         m_image->computeIntrinsicDimensions(intrinsicWidth, intrinsicHeight, intrinsicRatio);
     }
 
@@ skipping 18 matching lines @@
     void destroyDecodedData(bool) override { }
 
     SVGImage* m_image;
     const FloatSize m_containerSize;
     const float m_zoom;
     const KURL m_url;
 };
 }
 
 #endif // SVGImageForContainer_h