cc: Only register live tiles with the TileManager

cc/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_TILE_MANAGER_H_
 #define CC_TILE_MANAGER_H_
 
 #include <list>
 #include <queue>
 #include <set>
@@ skipping 60 matching lines @@
     bool is_tile_in_pending_tree_now_bin;
     TileResolution tile_resolution;
 };
 
 // This is state that is specific to a tile that is
 // managed by the TileManager.
 class CC_EXPORT ManagedTileState : public base::RefCounted<ManagedTileState> {
  public:
   ManagedTileState(Tile* tile);
   scoped_ptr<base::Value> AsValue() const;
+  bool can_be_freed() const { return !cannot_be_freed_ref.get(); }
 
   // Persisted state: valid all the time.
   scoped_refptr<Tile> tile;
   bool can_use_gpu_memory;
-  bool can_be_freed;
+  scoped_refptr<ManagedTileState> cannot_be_freed_ref;
   scoped_ptr<ResourcePool::Resource> resource;
   bool resource_is_being_initialized;
   bool contents_swizzled;
   bool need_to_gather_pixel_refs;
   std::list<skia::LazyPixelRef*> pending_pixel_refs;
   TileRasterState raster_state;
 
   // Ephemeral state, valid only during Manage.
   TileManagerBin bin[NUM_BIN_PRIORITIES];
   TileManagerBin tree_bin[NUM_TREES];
@@ skipping 84 matching lines @@
   void DispatchOneRasterTask(scoped_refptr<ManagedTileState> tile);
   void PerformOneRaster(ManagedTileState* mts);
   void OnRasterCompleted(
       scoped_refptr<ManagedTileState> tile,
       scoped_ptr<ResourcePool::Resource> resource,
       int manage_tiles_call_count_when_dispatched);
   void OnRasterTaskCompleted(
       scoped_refptr<ManagedTileState> tile,
       scoped_ptr<ResourcePool::Resource> resource,
       int manage_tiles_call_count_when_dispatched);
-  void DidFinishTileInitialization(ManagedTileState* mts);
   void DidTileRasterStateChange(ManagedTileState* mts, TileRasterState state);
   void DidTileTreeBinChange(ManagedTileState* mts,
                             TileManagerBin new_tree_bin,
                             WhichTree tree);
   scoped_ptr<Value> GetMemoryRequirementsAsValue() const;
 
   static void PerformRaster(uint8* buffer,
                             const gfx::Rect& rect,
                             float contents_scale,
                             bool use_cheapness_estimator,
@@ skipping 40 matching lines @@
 
   bool use_cheapness_estimator_;
   int raster_state_count_[NUM_STATES][NUM_TREES][NUM_BINS];
 
   DISALLOW_COPY_AND_ASSIGN(TileManager);
 };
 
 }  // namespace cc
 
 #endif  // CC_TILE_MANAGER_H_