cc: Cull DrawingDisplayItems outside of the raster playback rect

cc/playback/display_item.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_DISPLAY_ITEM_H_
 #define CC_PLAYBACK_DISPLAY_ITEM_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "cc/base/cc_export.h"
 #include "cc/debug/traced_value.h"
@@ skipping 11 matching lines @@
   void SetNew(bool is_suitable_for_gpu_rasterization,
               int approximate_op_count,
               size_t picture_memory_usage) {
     is_suitable_for_gpu_rasterization_ = is_suitable_for_gpu_rasterization;
     approximate_op_count_ = approximate_op_count;
     picture_memory_usage_ =
         picture_memory_usage + sizeof(bool) + sizeof(int) + sizeof(size_t);
   }
 
   virtual void Raster(SkCanvas* canvas,
+                      const gfx::Rect& canvas_target_playback_rect,
                       SkPicture::AbortCallback* callback) const = 0;
   virtual void AsValueInto(base::trace_event::TracedValue* array) const = 0;
 
   bool is_suitable_for_gpu_rasterization() const {
     return is_suitable_for_gpu_rasterization_;
   }
   int approximate_op_count() const { return approximate_op_count_; }
   size_t picture_memory_usage() const { return picture_memory_usage_; }
 
  protected:
   DisplayItem();
 
   bool is_suitable_for_gpu_rasterization_;
   int approximate_op_count_;
   size_t picture_memory_usage_;
 };
 
 }  // namespace cc
 
 #endif  // CC_PLAYBACK_DISPLAY_ITEM_H_