Remove intermediate SkPicture recording from GPU tile rasterization.

cc/playback/raster_source.h

 // Copyright 2014 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 CC_PLAYBACK_RASTER_SOURCE_H_
 #define CC_PLAYBACK_RASTER_SOURCE_H_
 
 #include <stddef.h>
 
 #include <memory>
@@ skipping 115 matching lines @@
 
   scoped_refptr<RasterSource> CreateCloneWithoutLCDText() const;
 
   // Image decode controller should be set once. Its lifetime has to exceed that
   // of the raster source, since the raster source will access it during raster.
   void set_image_decode_cache(ImageDecodeCache* image_decode_cache) {
     DCHECK(image_decode_cache);
     image_decode_cache_ = image_decode_cache;
   }
 
-  // Returns the ImageDecodeCache, currently only used by
-  // GpuRasterBufferProvider in order to create its own ImageHijackCanvas.
-  // Because of the MultiPictureDraw approach used by GPU raster, it does not
-  // integrate well with the use of the ImageHijackCanvas internal to this
-  // class. See gpu_raster_buffer_provider.cc for more information.
-  // TODO(crbug.com/628394): Redesign this to avoid exposing
-  // ImageDecodeCache from the raster source.
-  ImageDecodeCache* image_decode_cache() const { return image_decode_cache_; }
-
  protected:
   friend class base::RefCountedThreadSafe<RasterSource>;
 
   RasterSource(const RecordingSource* other, bool can_use_lcd_text);
   RasterSource(const RasterSource* other, bool can_use_lcd_text);
   virtual ~RasterSource();
 
   // These members are const as this raster source may be in use on another
   // thread and so should not be touched after construction.
   const scoped_refptr<DisplayItemList> display_list_;
@@ skipping 19 matching lines @@
   void RasterCommon(SkCanvas* canvas, SkPicture::AbortCallback* callback) const;
 
   void PrepareForPlaybackToCanvas(SkCanvas* canvas) const;
 
   DISALLOW_COPY_AND_ASSIGN(RasterSource);
 };
 
 }  // namespace cc
 
 #endif  // CC_PLAYBACK_RASTER_SOURCE_H_