dbus changes: add SetGlobalOutputChannelRemix support

chromeos/dbus/cras_audio_client.h

 // Copyright (c) 2013 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 CHROMEOS_DBUS_CRAS_AUDIO_CLIENT_H_
 #define CHROMEOS_DBUS_CRAS_AUDIO_CLIENT_H_
 
 #include <stdint.h>
 
 #include "base/callback.h"
@@ skipping 110 matching lines @@
   // removing an active output node added by AddActiveOutputNode.
   virtual void RemoveActiveOutputNode(uint64_t node_id) = 0;
 
   // Swaps the left and right channel of 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.
   // The dbus message will be dropped if this feature is not supported on the
   // |node_id|.
   virtual void SwapLeftRight(uint64_t node_id, bool swap) = 0;
 
+  virtual void SetGlobalOutputChannelRemix(
+      int32_t channels, const std::vector<double>& mixer) = 0;
+
   // Runs the callback as soon as the service becomes available.
   virtual void WaitForServiceToBeAvailable(
       const WaitForServiceToBeAvailableCallback& callback) = 0;
 
   // Creates the instance.
   static CrasAudioClient* Create();
 
  protected:
   // Create() should be used instead.
   CrasAudioClient();
 
  private:
   DISALLOW_COPY_AND_ASSIGN(CrasAudioClient);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROMEOS_DBUS_CRAS_AUDIO_CLIENT_H_