cc: Gather and lock/unlock SkDiscardablePixelRefs instead of skia::LazyPixelRefs.

cc/resources/tile_manager.h

 // Copyright 2012 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_TILE_MANAGER_H_
 #define CC_RESOURCES_TILE_MANAGER_H_
 
 #include <queue>
 #include <set>
 #include <vector>
@@ skipping 136 matching lines @@
       const TileVector& tiles_that_need_to_be_rasterized);
 
   void AssignGpuMemoryToTiles(
       PrioritizedTileSet* tiles,
       TileVector* tiles_that_need_to_be_rasterized);
   void GetTilesWithAssignedBins(PrioritizedTileSet* tiles);
 
  private:
   void OnImageDecodeTaskCompleted(
       int layer_id,
-      skia::LazyPixelRef* pixel_ref,
+      SkPixelRef* pixel_ref,
       bool was_canceled);
   void OnRasterTaskCompleted(Tile::Id tile,
                              scoped_ptr<ScopedResource> resource,
                              RasterMode raster_mode,
                              const PicturePileImpl::Analysis& analysis,
                              bool was_canceled);
 
   inline size_t BytesConsumedIfAllocated(const Tile* tile) const {
     return Resource::MemorySizeBytes(tile->size(),
                                      raster_worker_pool_->GetResourceFormat());
   }
 
   RasterMode DetermineRasterMode(const Tile* tile) const;
   void FreeResourceForTile(Tile* tile, RasterMode mode);
   void FreeResourcesForTile(Tile* tile);
   void FreeUnusedResourcesForTile(Tile* tile);
   RasterWorkerPool::Task CreateImageDecodeTask(
-      Tile* tile, skia::LazyPixelRef* pixel_ref);
+      Tile* tile, SkPixelRef* pixel_ref);
   RasterWorkerPool::RasterTask CreateRasterTask(Tile* tile);
   scoped_ptr<base::Value> GetMemoryRequirementsAsValue() const;
   void UpdatePrioritizedTileSetIfNeeded();
 
   TileManagerClient* client_;
   scoped_ptr<ResourcePool> resource_pool_;
   scoped_ptr<RasterWorkerPool> raster_worker_pool_;
   GlobalStateThatImpactsTilePriority global_state_;
 
   typedef base::hash_map<Tile::Id, Tile*> TileMap;
@@ skipping 30 matching lines @@
   RasterTaskCompletionStats update_visible_tiles_stats_;
 
   std::vector<Tile*> released_tiles_;
 
   DISALLOW_COPY_AND_ASSIGN(TileManager);
 };
 
 }  // namespace cc
 
 #endif  // CC_RESOURCES_TILE_MANAGER_H_