Flip the left/right speaker when the device is in yoga mode.

ash/system/audio/tray_audio_delegate.h

 // Copyright 2014 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.
 
 #ifndef ASH_SYSTEM_AUDIO_TRAY_AUDIO_DELEGATE_H_
 #define ASH_SYSTEM_AUDIO_TRAY_AUDIO_DELEGATE_H_
 
 namespace ash {
 namespace system {
 
@@ skipping 22 matching lines @@
   virtual bool HasAlternativeSources() = 0;
 
   // Returns whether the output volume is muted.
   virtual bool IsOutputAudioMuted() = 0;
 
   // Sets the mute state of the output device.
   virtual void SetOutputAudioIsMuted(bool is_muted) = 0;
 
   // Sets the volume level of the output device in the range 0%-100%
   virtual void SetOutputVolumeLevel(int level) = 0;
+
+  // Swaps the left and right channel of the the primary active output device.
+  // Swap the left and right channel if |swap| is true; otherwise, swap the left
+  // and right channel back to the normal mode.
+  virtual void SwapLeftRight(bool swap) = 0;

[oshima, 2014/09/30 22:29:53]

It'd be better to have something like: (assuming this is how it works)

enum AudioChannelMode {  // Or SwapMode, LeftRightMode?
  NORMAL,
  LEFT_RIGHT_SWAPPED,
}

SetAutioChannelMode(AudioChannelMode);

[jennyz, 2014/10/01 00:22:59]

Done.

 };
 
 }  // namespace system
 }  // namespace ash
 
 #endif  // ASH_SYSTEM_AUDIO_TRAY_AUDIO_DELEGATE_H_