cc: Remove ScheduleOnOriginThread() and CompleteOnOriginThread().

cc/raster/one_copy_tile_task_worker_pool.h

Index: cc/raster/one_copy_tile_task_worker_pool.h
diff --git a/cc/raster/one_copy_tile_task_worker_pool.h b/cc/raster/one_copy_tile_task_worker_pool.h
index f691232c33caee2269be9d2cf7e838059312de1d..d601ee9d111429432786f00d6972b094c1b14340 100644
--- a/cc/raster/one_copy_tile_task_worker_pool.h
+++ b/cc/raster/one_copy_tile_task_worker_pool.h
@@ -61,9 +61,10 @@ class CC_EXPORT OneCopyTileTaskWorkerPool
   // Overridden from TileTaskRunner:
   void Shutdown() override;
   void ScheduleTasks(TaskGraph* graph) override;
-  void CheckForCompletedTasks() override;
+  void CollectCompletedTasks(Task::Vector* completed_tasks) override;
   ResourceFormat GetResourceFormat(bool must_support_alpha) const override;
   bool GetResourceRequiresSwizzle(bool must_support_alpha) const override;
+  TileTaskClient* AsTileTaskClient() override;
 
   // Overridden from TileTaskClient:
   scoped_ptr<RasterBuffer> AcquireBufferForRaster(
@@ -140,8 +141,6 @@ class CC_EXPORT OneCopyTileTaskWorkerPool
   const int max_bytes_per_copy_operation_;
   const bool use_partial_raster_;
 
-  Task::Vector completed_tasks_;
-
   mutable base::Lock lock_;
   // |lock_| must be acquired when accessing the following members.
   using StagingBufferSet = std::set<const StagingBuffer*>;