Add flag for enabling WebRTC AEC debug recordings.

content/renderer/media/media_stream_dependency_factory.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/renderer/media/media_stream_dependency_factory.h"
 
 #include <vector>
 
+#include "base/command_line.h"
 #include "base/synchronization/waitable_event.h"
 #include "base/utf_string_conversions.h"
+#include "content/public/common/content_switches.h"
 #include "content/renderer/media/media_stream_source_extra_data.h"
 #include "content/renderer/media/rtc_media_constraints.h"
 #include "content/renderer/media/rtc_peer_connection_handler.h"
 #include "content/renderer/media/rtc_video_capturer.h"
 #include "content/renderer/media/video_capture_impl_manager.h"
 #include "content/renderer/media/webaudio_capturer_source.h"
 #include "content/renderer/media/webrtc_audio_device_impl.h"
 #include "content/renderer/media/webrtc_local_audio_track.h"
 #include "content/renderer/media/webrtc_logging_handler_impl.h"
 #include "content/renderer/media/webrtc_logging_message_filter.h"
@@ skipping 273 matching lines @@
 
     const StreamDeviceInfo device_info = source_data->device_info();
     if (IsAudioMediaType(device_info.device.type)) {
       if (!InitializeAudioSource(render_view_id, device_info)) {
         DLOG(WARNING) << "Unsupported audio source";
         sources_created.Run(description, false);
         return;
       }
     }
 
+    const CommandLine& command_line = *CommandLine::ForCurrentProcess();
+    // TODO(grunell): Change hard coded string to
+    // RTCMediaConstraints::kInternalAecDump when libjingle has been rolled.
+    if (command_line.HasSwitch(switches::kEnableWebRtcAecRecordings)) {
+      native_audio_constraints.AddOptional(
+          "internalAecDump", "true");
+    }
+
     // Creates a LocalAudioSource object which holds audio options.
     source_data->SetLocalAudioSource(
         CreateLocalAudioSource(&native_audio_constraints));
     source_observer->AddSource(source_data->local_audio_source());
   }
 
   source_observer->StartObservering();
 }
 
 void MediaStreamDependencyFactory::CreateNativeLocalMediaStream(
@@ skipping 467 matching lines @@
     WebRtcLoggingMessageFilter* filter,
     const std::string& app_session_id) {
   WebRtcLoggingHandlerImpl* handler =
       new WebRtcLoggingHandlerImpl(filter->io_message_loop());
 
   // TODO(grunell): Give app session id as parameter.
   filter->InitLogging(handler);
 }
 
 }  // namespace content