cc: Adding BeginFrameTracker object and removing Now() from LTHI.

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>
 
 #include "base/basictypes.h"
 #include "base/cancelable_callback.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/time/time.h"
 #include "cc/base/cc_export.h"
 #include "cc/output/begin_frame_args.h"
 #include "cc/output/vsync_parameter_observer.h"
 #include "cc/scheduler/begin_frame_source.h"
+#include "cc/scheduler/begin_frame_tracker.h"
 #include "cc/scheduler/delay_based_time_source.h"
 #include "cc/scheduler/draw_result.h"
 #include "cc/scheduler/scheduler_settings.h"
 #include "cc/scheduler/scheduler_state_machine.h"
 
 namespace base {
 namespace trace_event {
 class ConvertableToTraceFormat;
 }
 class SingleThreadTaskRunner;
@@ skipping 171 matching lines @@
   bool throttle_frame_production_;
 
   const SchedulerSettings settings_;
   SchedulerClient* client_;
   int layer_tree_host_id_;
   scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
 
   base::TimeDelta estimated_parent_draw_time_;
 
   std::deque<BeginFrameArgs> begin_retro_frame_args_;
-  BeginFrameArgs begin_impl_frame_args_;
   SchedulerStateMachine::BeginImplFrameDeadlineMode
       begin_impl_frame_deadline_mode_;
+  BeginFrameTracker begin_impl_frame_tracker_;
 
   base::Closure begin_retro_frame_closure_;
   base::Closure begin_impl_frame_deadline_closure_;
   base::Closure advance_commit_state_closure_;
   base::CancelableClosure begin_retro_frame_task_;
   base::CancelableClosure begin_impl_frame_deadline_task_;
   base::CancelableClosure advance_commit_state_task_;
 
   SchedulerStateMachine state_machine_;
   bool inside_process_scheduled_actions_;
   SchedulerStateMachine::Action inside_action_;
 
  private:
   void ScheduleBeginImplFrameDeadline();
   void ScheduleBeginImplFrameDeadlineIfNeeded();
   void SetupNextBeginFrameIfNeeded();
   void PostBeginRetroFrameIfNeeded();
   void SetupPollingMechanisms();
   void DrawAndSwapIfPossible();
   void ProcessScheduledActions();
   bool CanCommitAndActivateBeforeDeadline() const;
   void AdvanceCommitStateIfPossible();
   bool IsBeginMainFrameSentOrStarted() const;
   void BeginRetroFrame();
   void BeginImplFrameWithDeadline(const BeginFrameArgs& args);
   void BeginImplFrameSynchronous(const BeginFrameArgs& args);
-  void BeginImplFrame();
+  void BeginImplFrame(const BeginFrameArgs& args);
   void FinishImplFrame();
   void OnBeginImplFrameDeadline();
   void PollToAdvanceCommitState();
 
   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_