Delete unused methods of the VideoProcessing class. And fix a typo.

webrtc/modules/video_processing/deflickering.h

-/*
- *  Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
- *
- *  Use of this source code is governed by a BSD-style license
- *  that can be found in the LICENSE file in the root of the source
- *  tree. An additional intellectual property rights grant can be found
- *  in the file PATENTS.  All contributing project authors may
- *  be found in the AUTHORS file in the root of the source tree.
- */
-
-#ifndef WEBRTC_MODULES_VIDEO_PROCESSING_DEFLICKERING_H_
-#define WEBRTC_MODULES_VIDEO_PROCESSING_DEFLICKERING_H_
-
-#include <string.h>  // NULL
-
-#include "webrtc/modules/video_processing/include/video_processing.h"
-#include "webrtc/typedefs.h"
-
-namespace webrtc {
-
-class VPMDeflickering {
- public:
-  VPMDeflickering();
-  ~VPMDeflickering();
-
-  void Reset();
-  int32_t ProcessFrame(VideoFrame* frame, VideoProcessing::FrameStats* stats);
-
- private:
-  int32_t PreDetection(uint32_t timestamp,
-                       const VideoProcessing::FrameStats& stats);
-
-  int32_t DetectFlicker();
-
-  enum { kMeanBufferLength = 32 };
-  enum { kFrameHistory_size = 15 };
-  enum { kNumProbs = 12 };
-  enum { kNumQuants = kNumProbs + 2 };
-  enum { kMaxOnlyLength = 5 };
-
-  uint32_t mean_buffer_length_;
-  uint8_t detection_state_;  // 0: No flickering
-                             // 1: Flickering detected
-                             // 2: In flickering
-  int32_t mean_buffer_[kMeanBufferLength];
-  uint32_t timestamp_buffer_[kMeanBufferLength];
-  uint32_t frame_rate_;
-  static const uint16_t prob_uw16_[kNumProbs];
-  static const uint16_t weight_uw16_[kNumQuants - kMaxOnlyLength];
-  uint8_t quant_hist_uw8_[kFrameHistory_size][kNumQuants];
-};
-
-}  // namespace webrtc
-
-#endif  // WEBRTC_MODULES_VIDEO_PROCESSING_DEFLICKERING_H_