Include default communication devices in audio device enumerations. This removes heuristic that pic…

content/browser/renderer_host/media/media_stream_manager.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/browser/renderer_host/media/media_stream_manager.h"
 
 #include <list>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 109 matching lines @@
        // This is normal video device capture.
        *video_type = MEDIA_DEVICE_VIDEO_CAPTURE;
      }
   }
 }
 
 // Turns off available audio effects (removes the flag) if the options
 // explicitly turn them off.
 void FilterAudioEffects(const StreamOptions& options, int* effects) {
   DCHECK(effects);
-  // TODO(ajm): Should we also handle ECHO_CANCELLER here?
-  std::string value;
-  if (options.GetFirstAudioConstraintByName(
-          kMediaStreamAudioDucking, &value, NULL) && value == "false") {
-    *effects &= ~media::AudioParameters::DUCKING;
-  }
+  // TODO(ajm): Should we handle ECHO_CANCELLER here?
 }
 
 // Unlike other effects, hotword is off by default, so turn it on if it's
 // requested and available.
 void EnableHotwordEffect(const StreamOptions& options, int* effects) {
   DCHECK(effects);
   std::string value;
   if (options.GetFirstAudioConstraintByName(
           kMediaStreamAudioHotword, &value, NULL) && value == "true") {
 #if defined(OS_CHROMEOS)
@@ skipping 2050 matching lines @@
   }
 }
 
 void MediaStreamManager::SetKeyboardMicOnDeviceThread() {
   DCHECK(device_task_runner_->BelongsToCurrentThread());
   audio_manager_->SetHasKeyboardMic();
 }
 #endif
 
 }  // namespace content