cc: Move --num-raster-threads setting to LayerTreeSettings.

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 <vector>
 
 #include "base/memory/scoped_ptr.h"
@@ skipping 50 matching lines @@
   TileResolution resolution;
   float time_to_needed_in_seconds;
 };
 
 // This class manages tiles, deciding which should get rasterized and which
 // should no longer have any memory assigned to them. Tile objects are "owned"
 // by layers; they automatically register with the manager when they are
 // created, and unregister from the manager when they are deleted.
 class CC_EXPORT TileManager {
  public:
-  TileManager(TileManagerClient* client, ResourceProvider *resource_provider);
+  TileManager(TileManagerClient* client,
+              ResourceProvider *resource_provider,
+              size_t num_raster_threads);
   virtual ~TileManager();
 
   const GlobalStateThatImpactsTilePriority& GlobalState() const { return global_state_; }
   void SetGlobalState(const GlobalStateThatImpactsTilePriority& state);
 
   void ManageTiles();
 
   void renderingStats(RenderingStats* stats);
 
  protected:
@@ skipping 13 matching lines @@
       scoped_refptr<Tile>,
       ResourceProvider::ResourceId,
       scoped_refptr<PicturePileImpl>,
       RenderingStats*);
   void DidFinishTileInitialization(Tile*, ResourceProvider::ResourceId);
 
   TileManagerClient* client_;
   scoped_ptr<ResourcePool> resource_pool_;
   bool manage_tiles_pending_;
   int pending_raster_tasks_;
+  size_t num_raster_threads_;
   scoped_refptr<base::SequencedWorkerPool> worker_pool_;
 
   GlobalStateThatImpactsTilePriority global_state_;
 
   typedef std::vector<Tile*> TileVector;
   TileVector tiles_;
   TileVector tiles_that_need_to_be_rasterized_;
 
   RenderingStats rendering_stats_;
 };
 
 }  // namespace cc
 
 #endif  // CC_TILE_MANAGER_H_