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;

[ajuma, 2013/06/06 18:00:35]

I'm adding this to SchedulerClient rather than to Scheduler since we eventually
want to include GPU process execution time in the estimate, and plumbing this to
the SchedulerClient (that is, to ThreadProxy) makes more sense than plumbing it
directly to Scheduler.

 
  protected:
   virtual ~SchedulerClient() {}
 };
 
 class CC_EXPORT Scheduler : FrameRateControllerClient {
  public:
   static scoped_ptr<Scheduler> Create(
       SchedulerClient* client,
       scoped_ptr<FrameRateController> frame_rate_controller,
@@ skipping 71 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_