Plumb activation time to main

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 59 matching lines @@
   void OnBeginFrameSourcePausedChanged(bool paused) override;
   bool OnBeginFrameDerivedImpl(const BeginFrameArgs& args) override;
 
   void OnDrawForCompositorFrameSink(bool resourceless_software_draw);
 
   const SchedulerSettings& settings() const { return settings_; }
 
   void SetVisible(bool visible);
   bool visible() { return state_machine_.visible(); }
   void SetCanDraw(bool can_draw);
-  void NotifyReadyToActivate();
+  void NotifyReadyToActivate(int source_frame_number);
   void NotifyReadyToDraw();
   void SetBeginFrameSource(BeginFrameSource* source);
 
   void SetNeedsBeginMainFrame();
   // Requests a single impl frame (after the current frame if there is one
   // active).
   void SetNeedsOneBeginImplFrame();
 
   void SetNeedsRedraw();
 
@@ skipping 93 matching lines @@
   base::CancelableClosure begin_impl_frame_deadline_task_;
   base::CancelableClosure missed_begin_frame_task_;
 
   SchedulerStateMachine state_machine_;
   bool inside_process_scheduled_actions_ = false;
   SchedulerStateMachine::Action inside_action_ =
       SchedulerStateMachine::ACTION_NONE;
 
   bool stopped_ = false;
 
+  // This is to report Activation (ReadyToActivate signal) time back to Main.
+  // A vector of pairs of source_frame_number and timestamp is captured, and
+  // sent back in BeginFrameArgs with the next ProxyMain::BeginMainFrame. A
+  // vector is needed as there can be multiple ReadyToActivate signals before
+  // the next BeginMainFrame.
+  std::vector<std::pair<uint32_t, base::TimeTicks>> ready_to_activate_time_;
+
  private:
   void ScheduleBeginImplFrameDeadline();
   void ScheduleBeginImplFrameDeadlineIfNeeded();
   void BeginImplFrameNotExpectedSoon();
   void SetupNextBeginFrameIfNeeded();
   void DrawIfPossible();
   void DrawForced();
   void ProcessScheduledActions();
   void UpdateCompositorTimingHistoryRecordingEnabled();
   bool ShouldRecoverMainLatency(const BeginFrameArgs& args,
@@ skipping 20 matching lines @@
   }
 
   base::WeakPtrFactory<Scheduler> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(Scheduler);
 };
 
 }  // namespace cc
 
 #endif  // CC_SCHEDULER_SCHEDULER_H_