Add synthetic delay points for latency testing

cc/resources/raster_worker_pool.h

 // Copyright 2013 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_RASTER_WORKER_POOL_H_
 #define CC_RESOURCES_RASTER_WORKER_POOL_H_
 
 #include <vector>
 
 #include "base/containers/hash_tables.h"
@@ skipping 228 matching lines @@
   }
   void set_raster_required_for_activation_finished_task(
       scoped_refptr<internal::WorkerPoolTask>
           raster_required_for_activation_finished_task) {
     raster_required_for_activation_finished_task_ =
         raster_required_for_activation_finished_task;
   }
 
   scoped_refptr<internal::WorkerPoolTask> CreateRasterFinishedTask();
   scoped_refptr<internal::WorkerPoolTask>
-      CreateRasterRequiredForActivationFinishedTask();
+      CreateRasterRequiredForActivationFinishedTask(
+          bool has_tasks_required_for_activation);
 
   scoped_ptr<base::Value> ScheduledStateAsValue() const;
 
   static internal::GraphNode* CreateGraphNodeForTask(
       internal::WorkerPoolTask* task,
       unsigned priority,
       TaskGraph* graph);
 
   static internal::GraphNode* CreateGraphNodeForRasterTask(
       internal::WorkerPoolTask* raster_task,
@@ skipping 13 matching lines @@
 
   scoped_refptr<internal::WorkerPoolTask> raster_finished_task_;
   scoped_refptr<internal::WorkerPoolTask>
       raster_required_for_activation_finished_task_;
   base::WeakPtrFactory<RasterWorkerPool> weak_ptr_factory_;
 };
 
 }  // namespace cc
 
 #endif  // CC_RESOURCES_RASTER_WORKER_POOL_H_