cc: Remove retro frames from scheduler.

cc/scheduler/scheduler_state_machine.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_STATE_MACHINE_H_
 #define CC_SCHEDULER_SCHEDULER_STATE_MACHINE_H_
 
 #include <memory>
 #include <string>
 
@@ skipping 45 matching lines @@
     OUTPUT_SURFACE_WAITING_FOR_FIRST_ACTIVATION,
   };
   static const char* OutputSurfaceStateToString(OutputSurfaceState state);
 
   // Note: BeginImplFrameState does not cycle through these states in a fixed
   // order on all platforms. It's up to the scheduler to set these correctly.
   // TODO(sunnyps): Rename the states to IDLE, ANIMATE, WAITING_FOR_DEADLINE and
   // DRAW.
   enum BeginImplFrameState {
     BEGIN_IMPL_FRAME_STATE_IDLE,
-    BEGIN_IMPL_FRAME_STATE_BEGIN_FRAME_STARTING,
     BEGIN_IMPL_FRAME_STATE_INSIDE_BEGIN_FRAME,
     BEGIN_IMPL_FRAME_STATE_INSIDE_DEADLINE,
   };
   static const char* BeginImplFrameStateToString(BeginImplFrameState state);
 
   enum BeginImplFrameDeadlineMode {
     BEGIN_IMPL_FRAME_DEADLINE_MODE_NONE,
     BEGIN_IMPL_FRAME_DEADLINE_MODE_IMMEDIATE,
     BEGIN_IMPL_FRAME_DEADLINE_MODE_REGULAR,
     BEGIN_IMPL_FRAME_DEADLINE_MODE_LATE,
@@ skipping 69 matching lines @@
   void AbortDrawAndSwap();
 
   // Indicates whether the impl thread needs a BeginImplFrame callback in order
   // to make progress.
   bool BeginFrameNeeded() const;
 
   // Indicates that the system has entered and left a BeginImplFrame callback.
   // The scheduler will not draw more than once in a given BeginImplFrame
   // callback nor send more than one BeginMainFrame message.
   void OnBeginImplFrame();
-  void OnBeginImplFrameDeadlinePending();
   // Indicates that the scheduler has entered the draw phase. The scheduler
   // will not draw more than once in a single draw phase.
   // TODO(sunnyps): Rename OnBeginImplFrameDeadline to OnDraw or similar.
   void OnBeginImplFrameDeadline();
   void OnBeginImplFrameIdle();
   BeginImplFrameState begin_impl_frame_state() const {
     return begin_impl_frame_state_;
   }
   BeginImplFrameDeadlineMode CurrentBeginImplFrameDeadlineMode() const;
 
@@ skipping 194 matching lines @@
   bool did_draw_in_last_frame_;
   bool did_swap_in_last_frame_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(SchedulerStateMachine);
 };
 
 }  // namespace cc
 
 #endif  // CC_SCHEDULER_SCHEDULER_STATE_MACHINE_H_