Supports multiple active input/output audio nodes in CrasAudioHandler.

extensions/shell/browser/shell_audio_controller_chromeos.cc

 // 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.
 
 #include "extensions/shell/browser/shell_audio_controller_chromeos.h"
 
 #include <algorithm>
 
 #include "chromeos/audio/audio_device.h"
 
@@ skipping 98 matching lines @@
   uint64 best_input = 0, best_output = 0;
   for (chromeos::AudioDeviceList::const_reverse_iterator it = devices.rbegin();
        it != devices.rend() && (!best_input || !best_output); ++it) {
     // TODO(derat): Need to check |plugged_time|?
     if (it->is_input && !best_input)
       best_input = it->id;
     else if (!it->is_input && !best_output)
       best_output = it->id;
   }
 
-  if (best_input && best_input != handler->GetActiveInputNode()) {
+  if (best_input && best_input != handler->GetPrimaryActiveInputNode()) {
     const chromeos::AudioDevice* device = GetDevice(devices, best_input);
     DCHECK(device);
     VLOG(1) << "Activating input device: " << device->ToString();
     handler->SwitchToDevice(*device);
   }
-  if (best_output && best_output != handler->GetActiveOutputNode()) {
+  if (best_output && best_output != handler->GetPrimaryActiveOutputNode()) {
     const chromeos::AudioDevice* device = GetDevice(devices, best_output);
     DCHECK(device);
     VLOG(1) << "Activating output device: " << device->ToString();
     handler->SwitchToDevice(*device);
   }
 }
 
 }  // namespace extensions