Unify VideoCodecType to/from string functionality

webrtc/modules/video_coding/codecs/test/videoprocessor.h

 /*
  *  Copyright (c) 2012 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.
  */
 
@@ skipping 90 matching lines @@
 
   // The codec settings to use for the test (target bitrate, video size,
   // framerate and so on). This struct must be created and filled in using
   // the VideoCodingModule::Codec() method.
   webrtc::VideoCodec* codec_settings;
 
   // If printing of information to stdout shall be performed during processing.
   bool verbose;
 };
 
-// Returns a string representation of the enum value.
-const char* VideoCodecTypeToStr(webrtc::VideoCodecType e);
-
 // Handles encoding/decoding of video using the VideoEncoder/VideoDecoder
 // interfaces. This is done in a sequential manner in order to be able to
 // measure times properly.
 // The class processes a frame at the time for the configured input file.
 // It maintains state of where in the source input file the processing is at.
 //
 // Regarding packet loss: Note that keyframes are excluded (first or all
 // depending on the ExcludeFrameTypes setting). This is because if key frames
 // would be altered, all the following delta frames would be pretty much
 // worthless. VP8 has an error-resilience feature that makes it able to handle
@@ skipping 133 matching lines @@
 
    private:
     VideoProcessorImpl* video_processor_;
   };
 };
 
 }  // namespace test
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_VIDEO_CODING_CODECS_TEST_VIDEOPROCESSOR_H_