Estimate draw duration in SchedulerClient

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 26 matching lines @@
   virtual ScheduledActionDrawAndSwapResult
   ScheduledActionDrawAndSwapIfPossible() = 0;
   virtual ScheduledActionDrawAndSwapResult
   ScheduledActionDrawAndSwapForced() = 0;
   virtual void ScheduledActionCommit() = 0;
   virtual void ScheduledActionCheckForCompletedTileUploads() = 0;
   virtual void ScheduledActionActivatePendingTreeIfNeeded() = 0;
   virtual void ScheduledActionBeginOutputSurfaceCreation() = 0;
   virtual void ScheduledActionAcquireLayerTexturesForMainThread() = 0;
   virtual void DidAnticipatedDrawTimeChange(base::TimeTicks time) = 0;
+  virtual base::TimeDelta DrawDurationEstimate() = 0;
 
  protected:
   virtual ~SchedulerClient() {}
 };
 
 class CC_EXPORT Scheduler : FrameRateControllerClient {
  public:
   static scoped_ptr<Scheduler> Create(
       SchedulerClient* client,
       scoped_ptr<FrameRateController> frame_rate_controller,
@@ skipping 72 matching lines @@
   scoped_ptr<FrameRateController> frame_rate_controller_;
   SchedulerStateMachine state_machine_;
   bool inside_process_scheduled_actions_;
 
   DISALLOW_COPY_AND_ASSIGN(Scheduler);
 };
 
 }  // namespace cc
 
 #endif  // CC_SCHEDULER_SCHEDULER_H_