Revert of Remove deprecated CodecType methods.

webrtc/common_types.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 532 matching lines @@
   kVideoCodecRED,
   kVideoCodecULPFEC,
   kVideoCodecFlexfec,
   kVideoCodecGeneric,
   kVideoCodecUnknown
 };
 
 // Translates from name of codec to codec type and vice versa.
 const char* CodecTypeToPayloadString(VideoCodecType type);
 VideoCodecType PayloadStringToCodecType(const std::string& name);
+// TODO(kthelgason): Remove these methods once upstream projects
+// have been updated.
+rtc::Optional<const char*> CodecTypeToPayloadName(VideoCodecType type);
+rtc::Optional<VideoCodecType> PayloadNameToCodecType(const std::string& name);
 
 union VideoCodecUnion {
   VideoCodecVP8 VP8;
   VideoCodecVP9 VP9;
   VideoCodecH264 H264;
 };
 
 // Simulcast is when the same stream is encoded multiple times with different
 // settings such as resolution.
 struct SimulcastStream {
@@ skipping 395 matching lines @@
   bool operator==(const RtpKeepAliveConfig& o) const {
     return timeout_interval_ms == o.timeout_interval_ms &&
            payload_type == o.payload_type;
   }
   bool operator!=(const RtpKeepAliveConfig& o) const { return !(*this == o); }
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_COMMON_TYPES_H_