cc: Add more info to the BeginMainFrame dump.

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 128 matching lines @@
   // to signal that the start time isn't known and should not be used for
   // scheduling or statistics purposes.
   void NotifyBeginMainFrameStarted(base::TimeTicks main_thread_start_time);
 
   base::TimeTicks LastBeginImplFrameTime();
 
   void SetDeferCommits(bool defer_commits);
 
   std::unique_ptr<base::trace_event::ConvertableToTraceFormat> AsValue() const;
 
+  void AsValueInto(base::trace_event::TracedValue* state) const;
+
   void SetVideoNeedsBeginFrames(bool video_needs_begin_frames);
 
   const BeginFrameSource* begin_frame_source() const {
     return begin_frame_source_;
   }
 
   BeginFrameAck CurrentBeginFrameAckForActiveTree() const;
 
  protected:
   // Virtual for testing.
   virtual base::TimeTicks Now() const;
 
   const SchedulerSettings settings_;
-  // Not owned.
-  SchedulerClient* client_;
-  int layer_tree_host_id_;
+  SchedulerClient* const client_;
+  const int layer_tree_host_id_;
   base::SingleThreadTaskRunner* task_runner_;
 
-  // Not owned.  May be null.
-  BeginFrameSource* begin_frame_source_;
-  bool observing_begin_frame_source_;
+  BeginFrameSource* begin_frame_source_ = nullptr;
+  bool observing_begin_frame_source_ = false;
+
+  bool skipped_last_frame_missed_exceeded_deadline_ = false;
+  bool skipped_last_frame_to_reduce_latency_ = false;
 
   std::unique_ptr<CompositorTimingHistory> compositor_timing_history_;
 
   SchedulerStateMachine::BeginImplFrameDeadlineMode
-      begin_impl_frame_deadline_mode_;
+      begin_impl_frame_deadline_mode_ =
+          SchedulerStateMachine::BEGIN_IMPL_FRAME_DEADLINE_MODE_NONE;
+
   BeginFrameTracker begin_impl_frame_tracker_;
   BeginFrameArgs begin_main_frame_args_;
 
   base::Closure begin_impl_frame_deadline_closure_;
   base::CancelableClosure begin_impl_frame_deadline_task_;
   base::CancelableClosure missed_begin_frame_task_;
 
   SchedulerStateMachine state_machine_;
-  bool inside_process_scheduled_actions_;
-  SchedulerStateMachine::Action inside_action_;
+  bool inside_process_scheduled_actions_ = false;
+  SchedulerStateMachine::Action inside_action_ =
+      SchedulerStateMachine::ACTION_NONE;
 
-  bool stopped_;
+  bool stopped_ = false;
 
  private:
   void ScheduleBeginImplFrameDeadline();
   void ScheduleBeginImplFrameDeadlineIfNeeded();
   void BeginImplFrameNotExpectedSoon();
   void SetupNextBeginFrameIfNeeded();
   void DrawIfPossible();
   void DrawForced();
   void ProcessScheduledActions();
   void UpdateCompositorTimingHistoryRecordingEnabled();
@@ skipping 21 matching lines @@
   }
 
   base::WeakPtrFactory<Scheduler> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(Scheduler);
 };
 
 }  // namespace cc
 
 #endif  // CC_SCHEDULER_SCHEDULER_H_