cc: Add support for partial swaps when using impl-side painting.

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 113 matching lines @@
     if (state != global_state_) {
       global_state_ = state;
       prioritized_tiles_dirty_ = true;
       resource_pool_->SetResourceUsageLimits(
           global_state_.soft_memory_limit_in_bytes,
           global_state_.unused_memory_limit_in_bytes,
           global_state_.num_resources_limit);
     }
   }
 
+  void ResetDamagedRect();
+
+  gfx::Rect GetDamagedRect();
+
  protected:
   TileManager(TileManagerClient* client,
               base::SequencedTaskRunner* task_runner,
               ResourceProvider* resource_provider,
               ContextProvider* context_provider,
               scoped_ptr<RasterWorkerPool> raster_worker_pool,
               scoped_ptr<RasterWorkerPool> direct_raster_worker_pool,
               size_t max_raster_usage_bytes,
               RenderingStatsInstrumentation* rendering_stats_instrumentation,
               bool use_rasterize_on_demand);
@@ skipping 99 matching lines @@
   std::vector<Tile*> released_tiles_;
 
   bool use_rasterize_on_demand_;
 
   // Queues used when scheduling raster tasks.
   RasterTaskQueue raster_queue_[NUM_RASTER_WORKER_POOL_TYPES];
 
   std::vector<scoped_refptr<internal::Task> > orphan_raster_tasks_;
 
   std::vector<PictureLayerImpl*> layers_;
+  gfx::Rect damage_rect_;
 
   DISALLOW_COPY_AND_ASSIGN(TileManager);
 };
 
 }  // namespace cc
 
 #endif  // CC_RESOURCES_TILE_MANAGER_H_