Add MODIFY_AUDIO_SETTINGS permission in Android manifest and implementation in audio manager.

media/base/android/media_jni_registrar.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/base/android/media_jni_registrar.h"
 
 #include "base/basictypes.h"
 #include "base/android/jni_android.h"
 #include "base/android/jni_registrar.h"
 
+#include "media/audio/android/audio_manager_android.h"
 #include "media/base/android/media_player_bridge.h"
 #include "media/base/android/media_player_listener.h"
 #include "media/video/capture/android/video_capture_device_android.h"
 
 namespace media {
 
 static base::android::RegistrationMethod kMediaRegisteredMethods[] = {
+  { "AudioManagerAndroid",
+    AudioManagerAndroid::RegisterAudioManager },
   { "MediaPlayerBridge",
     MediaPlayerBridge::RegisterMediaPlayerBridge },
   { "MediaPlayerListener",
     MediaPlayerListener::RegisterMediaPlayerListener },
   { "VideoCaptureDevice",
     VideoCaptureDeviceAndroid::RegisterVideoCaptureDevice },
 };
 
 bool RegisterJni(JNIEnv* env) {
   return base::android::RegisterNativeMethods(
       env, kMediaRegisteredMethods, arraysize(kMediaRegisteredMethods));
 }
 
 }  // namespace media