cc: Use pointers for heaps in tile manager raster tile priority queue.

cc/resources/raster_tile_priority_queue.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_RESOURCES_RASTER_TILE_PRIORITY_QUEUE_H_
 #define CC_RESOURCES_RASTER_TILE_PRIORITY_QUEUE_H_
 
 #include <utility>
 #include <vector>
 
@@ skipping 30 matching lines @@
   void Build(const std::vector<PictureLayerImpl::Pair>& paired_layers,
              TreePriority tree_priority);
   void Reset();
 
   bool IsEmpty() const;
   Tile* Top();
   void Pop();
 
  private:
   std::vector<PairedPictureLayerQueue> paired_queues_;
+  std::vector<PairedPictureLayerQueue*> paired_queues_heap_;

[reveman, 2014/08/04 14:37:16]

Please use ScopedPtrVector unless that is significantly slower. Also, please add
a note about this possible being unnecessary.

[vmpstr, 2014/08/04 16:46:26]

Done.

   TreePriority tree_priority_;
 
   DISALLOW_COPY_AND_ASSIGN(RasterTilePriorityQueue);
 };
 
 }  // namespace cc
 
 #endif  // CC_RESOURCES_RASTER_TILE_PRIORITY_QUEUE_H_