Create a new action triggered when a BeginMainFrame is not expected before vsync

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 <memory>
 #include <string>
@@ skipping 30 matching lines @@
   virtual DrawResult ScheduledActionDrawIfPossible() = 0;
   virtual DrawResult ScheduledActionDrawForced() = 0;
   virtual void ScheduledActionCommit() = 0;
   virtual void ScheduledActionActivateSyncTree() = 0;
   virtual void ScheduledActionBeginCompositorFrameSinkCreation() = 0;
   virtual void ScheduledActionPrepareTiles() = 0;
   virtual void ScheduledActionInvalidateCompositorFrameSink() = 0;
   virtual void ScheduledActionPerformImplSideInvalidation() = 0;
   virtual void DidFinishImplFrame() = 0;
   virtual void SendBeginMainFrameNotExpectedSoon() = 0;
+  virtual void ScheduledActionDoShortIdleWork(const BeginFrameArgs& args) = 0;

[Sami, 2017/03/24 15:24:10]

I think my entry to the great bikeshedding race of 2017 is still
ScheduledActionBeginMainFrameNotExpectedUntil(const base::TimeTicks&). The
reason is that the cc scheduler doesn't really know or care about what the main
thread does with this notification -- it doesn't necessarily need to be idle
work.

[Dan Elphick, 2017/03/29 16:02:44]

Done.

 
  protected:
   virtual ~SchedulerClient() {}
 };
 
 class CC_EXPORT Scheduler : public BeginFrameObserverBase {
  public:
   Scheduler(SchedulerClient* client,
             const SchedulerSettings& scheduler_settings,
             int layer_tree_host_id,
@@ skipping 121 matching lines @@
   SchedulerStateMachine state_machine_;
   bool inside_process_scheduled_actions_;
   SchedulerStateMachine::Action inside_action_;
 
   bool stopped_;
 
  private:
   void ScheduleBeginImplFrameDeadline();
   void ScheduleBeginImplFrameDeadlineIfNeeded();
   void BeginImplFrameNotExpectedSoon();
+  void ScheduleShortIdleWork(const BeginFrameArgs& args);
   void SetupNextBeginFrameIfNeeded();
   void DrawIfPossible();
   void DrawForced();
   void ProcessScheduledActions();
   void UpdateCompositorTimingHistoryRecordingEnabled();
   bool ShouldRecoverMainLatency(const BeginFrameArgs& args,
                                 bool can_activate_before_deadline) const;
   bool ShouldRecoverImplLatency(const BeginFrameArgs& args,
                                 bool can_activate_before_deadline) const;
   bool CanBeginMainFrameAndActivateBeforeDeadline(
@@ skipping 16 matching lines @@
   }
 
   base::WeakPtrFactory<Scheduler> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(Scheduler);
 };
 
 }  // namespace cc
 
 #endif  // CC_SCHEDULER_SCHEDULER_H_