Build WebRTC with data channel only.

webrtc/pc/mediacontroller.cc

 /*
  *  Copyright 2015 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 35 matching lines @@
     Close();
   }
 
   // webrtc::MediaControllerInterface implementation.
   void Close() override {
     worker_thread_->Invoke<void>(RTC_FROM_HERE,
                                  rtc::Bind(&MediaController::Close_w, this));
   }
   webrtc::Call* call_w() override {
     RTC_DCHECK(worker_thread_->IsCurrent());
+#ifdef HAVE_MEDIA
     if (!call_) {
       call_.reset(webrtc::Call::Create(call_config_));
     }
+#endif
     return call_.get();
   }
   cricket::ChannelManager* channel_manager() const override {
     return channel_manager_;
   }
   const cricket::MediaConfig& config() const override { return media_config_; }
 
  private:
   void Construct_w(cricket::MediaEngineInterface* media_engine) {
     RTC_DCHECK(worker_thread_->IsCurrent());
+#ifdef HAVE_MEDIA
     RTC_DCHECK(media_engine);
     call_config_.audio_state = media_engine->GetAudioState();
+#endif
     call_config_.bitrate_config.min_bitrate_bps = kMinBandwidthBps;
     call_config_.bitrate_config.start_bitrate_bps = kStartBandwidthBps;
     call_config_.bitrate_config.max_bitrate_bps = kMaxBandwidthBps;
   }
   void Close_w() {
     RTC_DCHECK(worker_thread_->IsCurrent());
     call_.reset();
   }
 
   rtc::Thread* const worker_thread_;
   const cricket::MediaConfig media_config_;
   cricket::ChannelManager* const channel_manager_;
   webrtc::Call::Config call_config_;
   std::unique_ptr<webrtc::Call> call_;
 
   RTC_DISALLOW_IMPLICIT_CONSTRUCTORS(MediaController);
 };
 }  // namespace {
 
 namespace webrtc {
 
 MediaControllerInterface* MediaControllerInterface::Create(
     const cricket::MediaConfig& config,
     rtc::Thread* worker_thread,
     cricket::ChannelManager* channel_manager,
     webrtc::RtcEventLog* event_log) {
   return new MediaController(config, worker_thread, channel_manager, event_log);
 }
 }  // namespace webrtc