Revert of Stop caching supported codecs in WebRtcVideoEngine2

webrtc/pc/channelmanager.h

 /*
  *  Copyright 2004 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 57 matching lines @@
     return true;
   }
 
   MediaEngineInterface* media_engine() { return media_engine_.get(); }
 
   // Retrieves the list of supported audio & video codec types.
   // Can be called before starting the media engine.
   void GetSupportedAudioSendCodecs(std::vector<AudioCodec>* codecs) const;
   void GetSupportedAudioReceiveCodecs(std::vector<AudioCodec>* codecs) const;
   void GetSupportedAudioRtpHeaderExtensions(RtpHeaderExtensions* ext) const;
-  std::vector<VideoCodec> GetSupportedVideoCodecs() const;
+  void GetSupportedVideoCodecs(std::vector<VideoCodec>* codecs) const;
   void GetSupportedVideoRtpHeaderExtensions(RtpHeaderExtensions* ext) const;
   void GetSupportedDataCodecs(std::vector<DataCodec>* codecs) const;
 
   // Indicates whether the media engine is started.
   bool initialized() const { return initialized_; }
   // Starts up the media engine.
   bool Init();
   // Shuts down the media engine.
   void Terminate();
 
@@ skipping 102 matching lines @@
 
   bool enable_rtx_;
   rtc::CryptoOptions crypto_options_;
 
   bool capturing_;
 };
 
 }  // namespace cricket
 
 #endif  // WEBRTC_PC_CHANNELMANAGER_H_