Modifies AudioInputCallback::OnData and use media::AudioBus instead of plain byte vector (Relanding)

media/audio/android/audio_record_input.h

 // Copyright 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 MEDIA_AUDIO_ANDROID_AUDIO_RECORD_INPUT_H_
 #define MEDIA_AUDIO_ANDROID_AUDIO_RECORD_INPUT_H_
 
 #include "base/android/jni_android.h"
 #include "base/threading/thread_checker.h"
 #include "media/audio/audio_io.h"
 #include "media/audio/audio_parameters.h"
 
 namespace media {
 
+class AudioBus;
 class AudioManagerAndroid;
 
 // Implements PCM audio input support for Android using the Java AudioRecord
 // interface. Most of the work is done by its Java counterpart in
 // AudioRecordInput.java. This class is created and lives on the Audio Manager
 // thread but recorded audio buffers are delivered on a thread managed by
 // the Java class.
 //
 // The Java class makes use of AudioEffect features which are first available
 // in Jelly Bean. It should not be instantiated running against earlier SDKs.
@@ skipping 32 matching lines @@
   base::android::ScopedJavaGlobalRef<jobject> j_audio_record_;
 
   // This is the only member accessed by both the Audio Manager and Java
   // threads. Explanations for why we do not require explicit synchronization
   // are given in the implementation.
   AudioInputCallback* callback_;
 
   // Owned by j_audio_record_.
   uint8* direct_buffer_address_;
 
+  scoped_ptr<media::AudioBus> audio_bus_;
+  int bytes_per_sample_;
+
   DISALLOW_COPY_AND_ASSIGN(AudioRecordInputStream);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_AUDIO_ANDROID_AUDIO_RECORD_INPUT_H_