Remove parts of //cc we aren't using

cc/debug/frame_rate_counter.h

-// Copyright 2012 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_DEBUG_FRAME_RATE_COUNTER_H_
-#define CC_DEBUG_FRAME_RATE_COUNTER_H_
-
-#include "base/basictypes.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/time/time.h"
-#include "cc/debug/ring_buffer.h"
-
-namespace cc {
-
-// This class maintains a history of timestamps, and provides functionality to
-// intelligently compute average frames per second.
-class FrameRateCounter {
- public:
-  static scoped_ptr<FrameRateCounter> Create(bool has_impl_thread);
-
-  int current_frame_number() const { return ring_buffer_.CurrentIndex(); }
-  int dropped_frame_count() const { return dropped_frame_count_; }
-  size_t time_stamp_history_size() const { return ring_buffer_.BufferSize(); }
-
-  void SaveTimeStamp(base::TimeTicks timestamp, bool software);
-
-  // n = 0 returns the oldest frame interval retained in the history, while n =
-  // time_stamp_history_size() - 1 returns the most recent frame interval.
-  base::TimeDelta RecentFrameInterval(size_t n) const;
-
-  // This is a heuristic that can be used to ignore frames in a reasonable way.
-  // Returns true if the given frame interval is too fast or too slow, based on
-  // constant thresholds.
-  bool IsBadFrameInterval(
-      base::TimeDelta interval_between_consecutive_frames) const;
-
-  void GetMinAndMaxFPS(double* min_fps, double* max_fps) const;
-  double GetAverageFPS() const;
-
-  typedef RingBuffer<base::TimeTicks, 136> RingBufferType;
-  RingBufferType::Iterator begin() const { return ring_buffer_.Begin(); }
-  RingBufferType::Iterator end() const { return ring_buffer_.End(); }
-
- private:
-  explicit FrameRateCounter(bool has_impl_thread);
-
-  RingBufferType ring_buffer_;
-
-  bool has_impl_thread_;
-  int dropped_frame_count_;
-
-  DISALLOW_COPY_AND_ASSIGN(FrameRateCounter);
-};
-
-}  // namespace cc
-
-#endif  // CC_DEBUG_FRAME_RATE_COUNTER_H_