Reland 153623004: Remove the unified IO code on the browser

media/audio/audio_output_dispatcher.cc

Index: media/audio/audio_output_dispatcher.cc
diff --git a/media/audio/audio_output_dispatcher.cc b/media/audio/audio_output_dispatcher.cc
index 1e78c9d2c369191981c1c96d6596dfc65975aaf0..7f3dd10e39a9177d7817661056b5600dbf05a0f3 100644
--- a/media/audio/audio_output_dispatcher.cc
+++ b/media/audio/audio_output_dispatcher.cc
@@ -11,13 +11,11 @@ namespace media {
 AudioOutputDispatcher::AudioOutputDispatcher(
     AudioManager* audio_manager,
     const AudioParameters& params,
-    const std::string& output_device_id,
-    const std::string& input_device_id)
+    const std::string& device_id)
     : audio_manager_(audio_manager),
       task_runner_(audio_manager->GetTaskRunner()),
       params_(params),
-      output_device_id_(output_device_id),
-      input_device_id_(input_device_id) {
+      device_id_(device_id) {
   // We expect to be instantiated on the audio thread.  Otherwise the
   // |task_runner_| member will point to the wrong message loop!
   DCHECK(audio_manager->GetTaskRunner()->BelongsToCurrentThread());