Added ability to dynamically toggle frame throttling in the scheduler.

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 <deque>
 #include <string>
 
@@ skipping 47 matching lines @@
 // This class exists to allow tests to override the frame source construction.
 // A virtual method can't be used as this needs to happen in the constructor
 // (see C++ FAQ / Section 23 - http://goo.gl/fnrwom for why).
 // This class exists solely long enough to construct the frame sources.
 class CC_EXPORT SchedulerFrameSourcesConstructor {
  public:
   virtual ~SchedulerFrameSourcesConstructor() {}
   virtual BeginFrameSource* ConstructPrimaryFrameSource(Scheduler* scheduler);
   virtual BeginFrameSource* ConstructBackgroundFrameSource(
       Scheduler* scheduler);
+  virtual BeginFrameSource* ConstructUnthrottledFrameSource(
+      Scheduler* scheduler);
 
  protected:
   SchedulerFrameSourcesConstructor() {}
 
   friend class Scheduler;
 };
 
 class CC_EXPORT Scheduler : public BeginFrameObserverMixIn,
                             public base::PowerObserver {
  public:
@@ skipping 27 matching lines @@
   void CommitVSyncParameters(base::TimeTicks timebase,
                              base::TimeDelta interval);
   void SetEstimatedParentDrawTime(base::TimeDelta draw_time);
 
   void SetCanStart();
 
   void SetVisible(bool visible);
   void SetCanDraw(bool can_draw);
   void NotifyReadyToActivate();
   void NotifyReadyToDraw();
+  void SetThrottleFrameProduction(bool throttle);
 
   void SetNeedsCommit();
 
   void SetNeedsRedraw();
 
   void SetNeedsAnimate();
 
   void SetNeedsPrepareTiles();
 
   void SetMaxSwapsPending(int max);
@@ skipping 52 matching lines @@
             scoped_ptr<BeginFrameSource> external_begin_frame_source,
             SchedulerFrameSourcesConstructor* frame_sources_constructor);
 
   // virtual for testing - Don't call these in the constructor or
   // destructor!
   virtual base::TimeTicks Now() const;
 
   scoped_ptr<BeginFrameSourceMultiplexer> frame_source_;
   BeginFrameSource* primary_frame_source_;
   BeginFrameSource* background_frame_source_;
+  BeginFrameSource* unthrottled_frame_source_;
 
   // Storage when frame sources are internal
   scoped_ptr<BeginFrameSource> primary_frame_source_internal_;
   scoped_ptr<SyntheticBeginFrameSource> background_frame_source_internal_;
+  scoped_ptr<BeginFrameSource> unthrottled_frame_source_internal_;
 
   VSyncParameterObserver* vsync_observer_;
+  bool throttle_frame_production_;
 
   const SchedulerSettings settings_;
   SchedulerClient* client_;
   int layer_tree_host_id_;
   scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
 
   base::PowerMonitor* power_monitor_;
 
   base::TimeDelta estimated_parent_draw_time_;
 
@@ skipping 26 matching lines @@
   bool CanCommitAndActivateBeforeDeadline() const;
   void AdvanceCommitStateIfPossible();
   bool IsBeginMainFrameSentOrStarted() const;
   void BeginRetroFrame();
   void BeginImplFrame(const BeginFrameArgs& args);
   void OnBeginImplFrameDeadline();
   void PollForAnticipatedDrawTriggers();
   void PollToAdvanceCommitState();
   void SetupPowerMonitoring();
   void TeardownPowerMonitoring();
+  void UpdateActiveFrameSource();
 
   base::TimeDelta EstimatedParentDrawTime() {
     return estimated_parent_draw_time_;
   }
 
   bool IsInsideAction(SchedulerStateMachine::Action action) {
     return inside_action_ == action;
   }
 
   base::WeakPtrFactory<Scheduler> weak_factory_;
 
   friend class SchedulerFrameSourcesConstructor;
   friend class TestSchedulerFrameSourcesConstructor;
 
   DISALLOW_COPY_AND_ASSIGN(Scheduler);
 };
 
 }  // namespace cc
 
 #endif  // CC_SCHEDULER_SCHEDULER_H_