Remove RegisterExternal{De,En}coder error codes.

webrtc/modules/video_coding/video_coding_impl.cc

 /*
  *  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 109 matching lines @@
   }
 
   // DEPRECATED.
   VideoCodecType SendCodec() const override {
     return sender_.SendCodecBlocking();
   }
 
   int32_t RegisterExternalEncoder(VideoEncoder* externalEncoder,
                                   uint8_t payloadType,
                                   bool internalSource) override {
-    return sender_.RegisterExternalEncoder(externalEncoder, payloadType,
-                                           internalSource);
+    sender_.RegisterExternalEncoder(externalEncoder, payloadType,
+                                    internalSource);
+    return 0;
   }
 
   int Bitrate(unsigned int* bitrate) const override {
     return sender_.Bitrate(bitrate);
   }
 
   int FrameRate(unsigned int* framerate) const override {
     return sender_.FrameRate(framerate);
   }
 
@@ skipping 46 matching lines @@
 
   bool VideoSuspended() const override { return sender_.VideoSuspended(); }
 
   int32_t RegisterReceiveCodec(const VideoCodec* receiveCodec,
                                int32_t numberOfCores,
                                bool requireKeyFrame) override {
     return receiver_.RegisterReceiveCodec(receiveCodec, numberOfCores,
                                           requireKeyFrame);
   }
 
-  int32_t RegisterExternalDecoder(VideoDecoder* externalDecoder,
-                                  uint8_t payloadType,
-                                  bool internalRenderTiming) override {
-    return receiver_.RegisterExternalDecoder(externalDecoder, payloadType,
-                                             internalRenderTiming);
+  void RegisterExternalDecoder(VideoDecoder* externalDecoder,
+                               uint8_t payloadType,
+                               bool internalRenderTiming) override {
+    receiver_.RegisterExternalDecoder(externalDecoder, payloadType,
+                                      internalRenderTiming);
   }
 
   int32_t RegisterReceiveCallback(
       VCMReceiveCallback* receiveCallback) override {
     return receiver_.RegisterReceiveCallback(receiveCallback);
   }
 
   int32_t RegisterReceiveStatisticsCallback(
       VCMReceiveStatisticsCallback* receiveStats) override {
     return receiver_.RegisterReceiveStatisticsCallback(receiveStats);
@@ skipping 117 matching lines @@
   return new VideoCodingModuleImpl(clock, event_factory, false, nullptr,
                                    nullptr);
 }
 
 void VideoCodingModule::Destroy(VideoCodingModule* module) {
   if (module != NULL) {
     delete static_cast<VideoCodingModuleImpl*>(module);
   }
 }
 }  // namespace webrtc