cc: Poll for state that triggers draws (synchronous compositor only)

cc/scheduler/scheduler.h

 // Copyright 2011 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_SCHEDULER_SCHEDULER_H_
 #define CC_SCHEDULER_SCHEDULER_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 80 matching lines @@
   bool CommitPending() const { return state_machine_.CommitPending(); }
   bool RedrawPending() const { return state_machine_.RedrawPending(); }
 
   bool WillDrawIfNeeded() const;
 
   base::TimeTicks AnticipatedDrawTime();
 
   base::TimeTicks LastBeginFrameOnImplThreadTime();
 
   void BeginFrame(const BeginFrameArgs& args);
+  void PollForAnticipatedDrawTriggers();
 
   scoped_ptr<base::Value> StateAsValue() {
     return state_machine_.AsValue().Pass();
   }
 
  private:
   Scheduler(SchedulerClient* client,
             const SchedulerSettings& scheduler_settings);
 
   void SetupNextBeginFrameIfNeeded();
   void DrawAndSwapIfPossible();
   void DrawAndSwapForced();
   void DrawAndReadback();
   void ProcessScheduledActions();
 
   const SchedulerSettings settings_;
   SchedulerClient* client_;
 
   base::WeakPtrFactory<Scheduler> weak_factory_;
   bool last_set_needs_begin_frame_;
   bool has_pending_begin_frame_;
   BeginFrameArgs last_begin_frame_args_;
+  base::CancelableClosure poll_for_draw_triggers_closure_;
 
   SchedulerStateMachine state_machine_;
   bool inside_process_scheduled_actions_;
 
   DISALLOW_COPY_AND_ASSIGN(Scheduler);
 };
 
 }  // namespace cc
 
 #endif  // CC_SCHEDULER_SCHEDULER_H_