Enable setting the maximum bitrate limit in RtpSender.

webrtc/media/base/mediaengine.cc

 /*
  *  Copyright (c) 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 17 matching lines @@
 MediaEngineFactory::MediaEngineCreateFunction
     MediaEngineFactory::SetCreateFunction(MediaEngineCreateFunction function) {
   MediaEngineCreateFunction old_function = create_function_;
   create_function_ = function;
   return old_function;
 }
 
 };  // namespace cricket
 
 #endif  // DISABLE_MEDIA_ENGINE_FACTORY
+
+namespace cricket {
+
+webrtc::RtpParameters CreateRtpParametersWithOneEncoding() {
+  webrtc::RtpParameters parameters;
+  webrtc::RtpEncodingParameters encoding;
+  parameters.encodings.push_back(encoding);
+  return parameters;
+}
+
+};  // namespace cricket