Make SingleThreadProxy a SchedulerClient

cc/scheduler/scheduler.h

Index: cc/scheduler/scheduler.h
diff --git a/cc/scheduler/scheduler.h b/cc/scheduler/scheduler.h
index 3de06acbdc44df021c00946205036bf6d0c121b9..f39204721e3b43240504b2cf8a8be0f8b5ee568c 100644
--- a/cc/scheduler/scheduler.h
+++ b/cc/scheduler/scheduler.h
@@ -54,9 +54,9 @@ class CC_EXPORT Scheduler {
       SchedulerClient* client,
       const SchedulerSettings& scheduler_settings,
       int layer_tree_host_id,
-      const scoped_refptr<base::SingleThreadTaskRunner>& impl_task_runner) {
+      const scoped_refptr<base::SingleThreadTaskRunner>& task_runner) {
     return make_scoped_ptr(new Scheduler(
-        client, scheduler_settings, layer_tree_host_id, impl_task_runner));
+        client, scheduler_settings, layer_tree_host_id, task_runner));
   }
 
   virtual ~Scheduler();
@@ -170,16 +170,15 @@ class CC_EXPORT Scheduler {
     scoped_refptr<DelayBasedTimeSource> time_source_;
   };
 
-  Scheduler(
-      SchedulerClient* client,
-      const SchedulerSettings& scheduler_settings,
-      int layer_tree_host_id,
-      const scoped_refptr<base::SingleThreadTaskRunner>& impl_task_runner);
+  Scheduler(SchedulerClient* client,
+            const SchedulerSettings& scheduler_settings,
+            int layer_tree_host_id,
+            const scoped_refptr<base::SingleThreadTaskRunner>& task_runner);
 
   const SchedulerSettings settings_;
   SchedulerClient* client_;
   int layer_tree_host_id_;
-  scoped_refptr<base::SingleThreadTaskRunner> impl_task_runner_;
+  scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
 
   base::TimeDelta vsync_interval_;
   base::TimeDelta estimated_parent_draw_time_;