Reland 153623004: Remove the unified IO code on the browser

media/audio/audio_manager.h

Index: media/audio/audio_manager.h
diff --git a/media/audio/audio_manager.h b/media/audio/audio_manager.h
index 04e89a6b7437e603d7cc54bb2ec7e5c53bb26541..a15dab57586e5a6ef3931c3b1acfe5ba482fbbed 100644
--- a/media/audio/audio_manager.h
+++ b/media/audio/audio_manager.h
@@ -88,11 +88,6 @@ class MEDIA_EXPORT AudioManager {
   // To create a stream for the default output device, pass an empty string
   // for |device_id|, otherwise the specified audio device will be opened.
   //
-  // The |input_device_id| is used for low-latency unified streams
-  // (input+output) only and then only if the audio parameters specify a >0
-  // input channel count.  In other cases this id is ignored and should be
-  // empty.
-  //
   // Returns NULL if the combination of the parameters is not supported, or if
   // we have reached some other platform specific limit.
   //
@@ -105,8 +100,7 @@ class MEDIA_EXPORT AudioManager {
   // Do not free the returned AudioOutputStream. It is owned by AudioManager.
   virtual AudioOutputStream* MakeAudioOutputStream(
       const AudioParameters& params,
-      const std::string& device_id,
-      const std::string& input_device_id) = 0;
+      const std::string& device_id) = 0;
 
   // Creates new audio output proxy. A proxy implements
   // AudioOutputStream interface, but unlike regular output stream
@@ -114,8 +108,7 @@ class MEDIA_EXPORT AudioManager {
   // sound is actually playing.
   virtual AudioOutputStream* MakeAudioOutputStreamProxy(
       const AudioParameters& params,
-      const std::string& device_id,
-      const std::string& input_device_id) = 0;
+      const std::string& device_id) = 0;
 
   // Factory to create audio recording streams.
   // |channels| can be 1 or 2.