cc: Cull DrawingDisplayItems outside of the raster playback rect

cc/playback/display_item_list.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_LIST_H_
 #define CC_PLAYBACK_DISPLAY_ITEM_LIST_H_
 
 #include "base/gtest_prod_util.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 24 matching lines @@
   // is used). The resulting display list will not support sidecar data.
   static scoped_refptr<DisplayItemList> Create(gfx::Rect layer_rect,
                                                bool use_cached_picture);
 
   static scoped_refptr<DisplayItemList> Create(
       gfx::Rect layer_rect,
       const DisplayItemListSettings& settings);
 
   void Raster(SkCanvas* canvas,
               SkPicture::AbortCallback* callback,
+              const gfx::Rect& canvas_target_playback_rect,
               float contents_scale) const;
 
   template <typename DisplayItemType>
   DisplayItemType* CreateAndAppendItem() {
 #if DCHECK_IS_ON()
     needs_process_ = true;
 #endif
     ProcessAppendedItemsOnTheFly();
     return items_.AllocateAndConstruct<DisplayItemType>();
   }
@@ skipping 51 matching lines @@
 
   friend class base::RefCountedThreadSafe<DisplayItemList>;
   friend class PixelRefMap::Iterator;
   FRIEND_TEST_ALL_PREFIXES(DisplayItemListTest, PictureMemoryUsage);
   DISALLOW_COPY_AND_ASSIGN(DisplayItemList);
 };
 
 }  // namespace cc
 
 #endif  // CC_PLAYBACK_DISPLAY_ITEM_LIST_H_