Add fuzzer for vp9 qp parser.

webrtc/modules/video_coding/utility/vp9_uncompressed_header_parser.h

 /*
  *  Copyright (c) 2017 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_CODING_UTILITY_VP9_UNCOMPRESSED_HEADER_PARSER_H_
 #define WEBRTC_MODULES_VIDEO_CODING_UTILITY_VP9_UNCOMPRESSED_HEADER_PARSER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
-#include "webrtc/base/bitbuffer.h"
-#include "webrtc/base/logging.h"
-
 namespace webrtc {
 
 namespace vp9 {
 
-class VP9BitReader : public ::rtc::BitBuffer {
- public:
-  VP9BitReader(const uint8_t* buffer, size_t length_)
-      : BitBuffer(buffer, length_) {}
-
-  uint32_t GetBit() {
-    uint32_t bit = 0;
-    if (ReadBits(&bit, 1))
-      return bit;
-
-    LOG(LS_WARNING) << "Failed to get bit. Reached EOF.";
-    return 0;
-  }
-
-  uint32_t GetValue(int bits) {
-    uint32_t value = 0;
-    if (ReadBits(&value, bits))
-      return value;
-
-    LOG(LS_WARNING) << "Failed to get bit. Reached EOF.";
-    return 0;
-  }
-
-  int32_t GetSignedValue(int bits) {
-    const int32_t value = static_cast<int>(GetValue(bits));
-    return GetBit() ? -value : value;
-  }
-};
-
 // Gets the QP, QP range: [0, 255].
 // Returns true on success, false otherwise.
 bool GetQp(const uint8_t* buf, size_t length, int* qp);
 
 }  // namespace vp9
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_VIDEO_CODING_UTILITY_VP9_UNCOMPRESSED_HEADER_PARSER_H_