Added a vector to TileManager to explicitly track live or allocated tiles.

cc/tile_manager.h

Index: cc/tile_manager.h
diff --git a/cc/tile_manager.h b/cc/tile_manager.h
index 005c42f79a2d6530da91fb8f70a3cd3d4c724358..afa5ada34bd554d6cb08ac86e5645c384aa2c936 100644
--- a/cc/tile_manager.h
+++ b/cc/tile_manager.h
@@ -159,9 +159,9 @@ class CC_EXPORT TileManager {
       int manage_tiles_call_count_when_dispatched);
   void DidFinishTileInitialization(Tile* tile);
   void DidTileRasterStateChange(Tile* tile, TileRasterState state);
-  void DidTileBinChange(Tile* tile,
-                        TileManagerBin bin,
-                        WhichTree tree);
+  void DidTileTreeBinChange(Tile* tile,
+                            TileManagerBin new_tree_bin,
+                            WhichTree tree);
   scoped_ptr<Value> GetMemoryRequirementsAsValue() const;
 
   static void PerformRaster(uint8* buffer,
@@ -185,7 +185,8 @@ class CC_EXPORT TileManager {
   GlobalStateThatImpactsTilePriority global_state_;
 
   typedef std::vector<Tile*> TileVector;
-  TileVector tiles_;
+  TileVector all_tiles_;
+  TileVector live_or_allocated_tiles_;
   TileVector tiles_that_need_to_be_rasterized_;
 
   typedef std::list<Tile*> TileList;