Adding C++ versions of currently spec'd "RtpParameters" structs.

webrtc/media/engine/webrtcvoiceengine_unittest.cc

 /*
  *  Copyright (c) 2008 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 271 matching lines @@
       EXPECT_FALSE(channel_->SetSendParameters(parameters));
     }
     EXPECT_EQ(expected_bitrate, GetCodecBitrate(kSsrc1));
   }
 
   // Sets the per-stream maximum bitrate limit for the specified SSRC.
   bool SetMaxBitrateForStream(int32_t ssrc, int bitrate) {
     webrtc::RtpParameters parameters = channel_->GetRtpSendParameters(ssrc);
     EXPECT_EQ(1UL, parameters.encodings.size());
 
-    parameters.encodings[0].max_bitrate_bps = bitrate;
+    parameters.encodings[0].max_bitrate_bps = rtc::Optional<int>(bitrate);
     return channel_->SetRtpSendParameters(ssrc, parameters);
   }
 
   void SetGlobalMaxBitrate(const cricket::AudioCodec& codec, int bitrate) {
     cricket::AudioSendParameters send_parameters;
     send_parameters.codecs.push_back(codec);
     send_parameters.max_bandwidth_bps = bitrate;
     SetSendParameters(send_parameters);
   }
 
@@ skipping 3370 matching lines @@
       nullptr, webrtc::CreateBuiltinAudioDecoderFactory(), nullptr);
   webrtc::RtcEventLogNullImpl event_log;
   std::unique_ptr<webrtc::Call> call(
       webrtc::Call::Create(webrtc::Call::Config(&event_log)));
   cricket::WebRtcVoiceMediaChannel channel(&engine, cricket::MediaConfig(),
                                            cricket::AudioOptions(), call.get());
   cricket::AudioRecvParameters parameters;
   parameters.codecs = engine.recv_codecs();
   EXPECT_TRUE(channel.SetRecvParameters(parameters));
 }