Support 3 channels for audio input.

media/audio/audio_input_controller.cc

 // Copyright (c) 2012 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 "media/audio/audio_input_controller.h"
 
 #include "base/bind.h"
 #include "base/threading/thread_restrictions.h"
 #include "media/base/limits.h"
 #include "media/base/scoped_histogram_timer.h"
 #include "media/base/user_input_monitor.h"
 
 namespace {
-const int kMaxInputChannels = 2;
+const int kMaxInputChannels = 3;
 
 // TODO(henrika): remove usage of timers and add support for proper
 // notification of when the input device is removed.  This was originally added
 // to resolve http://crbug.com/79936 for Windows platforms.  This then caused
 // breakage (very hard to repro bugs!) on other platforms: See
 // http://crbug.com/226327 and http://crbug.com/230972.
 // See also that the timer has been disabled on Mac now due to
 // crbug.com/357501.
 const int kTimerResetIntervalSeconds = 1;
 // We have received reports that the timer can be too trigger happy on some
@@ skipping 368 matching lines @@
 
 void AudioInputController::SetDataIsActive(bool enabled) {
   base::subtle::Release_Store(&data_is_active_, enabled);
 }
 
 bool AudioInputController::GetDataIsActive() {
   return (base::subtle::Acquire_Load(&data_is_active_) != false);
 }
 
 }  // namespace media