Draw recorded content directly into the containing PaintCanvas, when possible.

third_party/WebKit/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 130 matching lines @@
                                float,
                                const FloatRect&,
                                const FloatSize&,
                                const FloatPoint&,
                                SkBlendMode,
                                const FloatRect&,
                                const FloatSize& repeatSpacing,
                                const KURL&);
   sk_sp<SkImage> imageForCurrentFrameForContainer(const KURL&,
                                                   const IntSize& containerSize);
+
+  // Paints the current frame. If a PaintCanvas is passed, paints into that
+  // canvas and returns nullptr.
+  // Otherwise returns a pointer to the new PaintRecord.
   sk_sp<PaintRecord> paintRecordForCurrentFrame(const FloatRect& bounds,
-                                                const KURL&);
+                                                const KURL&,
+                                                PaintCanvas* = nullptr);
 
   void drawInternal(PaintCanvas*,
                     const PaintFlags&,
                     const FloatRect& fromRect,
                     const FloatRect& toRect,
                     RespectImageOrientationEnum,
                     ImageClampingMode,
                     const KURL&);
 
   template <typename Func>
@@ skipping 39 matching lines @@
 
   ~ImageObserverDisabler() { m_image->setImageObserverDisabled(false); }
 
  private:
   Image* m_image;
 };
 
 }  // namespace blink
 
 #endif  // SVGImage_h