cc: Move scheduling logic out of OutputSurface

cc/scheduler/frame_rate_controller.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_FRAME_RATE_CONTROLLER_H_
-#define CC_SCHEDULER_FRAME_RATE_CONTROLLER_H_
-
-#include "base/memory/ref_counted.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/memory/weak_ptr.h"
-#include "base/time/time.h"
-#include "cc/base/cc_export.h"
-#include "cc/output/begin_frame_args.h"
-#include "cc/scheduler/time_source.h"
-
-namespace base { class SingleThreadTaskRunner; }
-
-namespace cc {
-
-class TimeSource;
-class FrameRateController;
-
-class CC_EXPORT FrameRateControllerClient {
- protected:
-  virtual ~FrameRateControllerClient() {}
-
- public:
-  virtual void FrameRateControllerTick(const BeginFrameArgs& args) = 0;
-};
-
-// The FrameRateController is used in cases where we self-tick (i.e. BeginFrame
-// is not sent by a parent compositor.
-class CC_EXPORT FrameRateController : TimeSourceClient {
- public:
-  explicit FrameRateController(scoped_refptr<TimeSource> timer);
-  virtual ~FrameRateController();
-
-  void SetClient(FrameRateControllerClient* client) { client_ = client; }
-
-  // Returns a valid BeginFrame on activation to potentially be used
-  // retroactively.
-  BeginFrameArgs SetActive(bool active);
-
-  bool IsActive() { return active_; }
-
-  void SetTimebaseAndInterval(base::TimeTicks timebase,
-                              base::TimeDelta interval);
-  void SetDeadlineAdjustment(base::TimeDelta delta);
-
-  virtual void OnTimerTick() OVERRIDE;
-
- protected:
-    // This returns null for unthrottled frame-rate.
-  base::TimeTicks NextTickTime();
-  // This returns now for unthrottled frame-rate.
-  base::TimeTicks LastTickTime();
-
-  FrameRateControllerClient* client_;
-  base::TimeDelta interval_;
-  base::TimeDelta deadline_adjustment_;
-  scoped_refptr<TimeSource> time_source_;
-  bool active_;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(FrameRateController);
-};
-
-}  // namespace cc
-
-#endif  // CC_SCHEDULER_FRAME_RATE_CONTROLLER_H_