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

third_party/WebKit/Source/platform/graphics/paint/PaintArtifact.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef PaintArtifact_h
 #define PaintArtifact_h
 
 #include "platform/PlatformExport.h"
 #include "platform/graphics/paint/DisplayItemList.h"
+#include "platform/graphics/paint/PaintCanvas.h"
 #include "platform/graphics/paint/PaintChunk.h"
 #include "wtf/Allocator.h"
 #include "wtf/Noncopyable.h"
 #include "wtf/Vector.h"
 
 namespace blink {
 
 class GraphicsContext;
 class WebDisplayItemList;
 
@@ skipping 44 matching lines @@
 
   // Resets to an empty paint artifact.
   void reset();
 
   // Returns the approximate memory usage, excluding memory likely to be
   // shared with the embedder after copying to WebDisplayItemList.
   size_t approximateUnsharedMemoryUsage() const;
 
   // Draws the paint artifact to a GraphicsContext.
   // |bounds| is the bounding box of the paint artifact's display list.
+  void replay(const FloatRect& bounds, GraphicsContext&) const;
+
+  // Draws the paint artifact to a PaintCanvas.
+  // |bounds| is the bounding box of the paint artifact's display list.
+  // SPv2 only.
   // In SPv2 mode, replays into the ancestor state given by |replayState|.
   void replay(
       const FloatRect& bounds,
-      GraphicsContext&,
+      PaintCanvas&,
       const PropertyTreeState& replayState = PropertyTreeState::root()) const;
 
   // Writes the paint artifact into a WebDisplayItemList.
   void appendToWebDisplayItemList(WebDisplayItemList*) const;
 
  private:
   DisplayItemList m_displayItemList;
   Vector<PaintChunk> m_paintChunks;
   bool m_isSuitableForGpuRasterization;
 };
 
 }  // namespace blink
 
 #endif  // PaintArtifact_h