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diff --git a/chromium/media/audio/android/audio_record_input.h b/chromium/media/audio/android/audio_record_input.h
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+++ b/chromium/media/audio/android/audio_record_input.h
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+// 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 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.
+class MEDIA_EXPORT AudioRecordInputStream : public AudioInputStream {
+ public:
+  AudioRecordInputStream(AudioManagerAndroid* manager,
+                         const AudioParameters& params);
+
+  virtual ~AudioRecordInputStream();
+
+  // Implementation of AudioInputStream.
+  virtual bool Open() OVERRIDE;
+  virtual void Start(AudioInputCallback* callback) OVERRIDE;
+  virtual void Stop() OVERRIDE;
+  virtual void Close() OVERRIDE;
+  virtual double GetMaxVolume() OVERRIDE;
+  virtual void SetVolume(double volume) OVERRIDE;
+  virtual double GetVolume() OVERRIDE;
+  virtual void SetAutomaticGainControl(bool enabled) OVERRIDE;
+  virtual bool GetAutomaticGainControl() OVERRIDE;
+
+  static bool RegisterAudioRecordInput(JNIEnv* env);
+
+  // Called from Java when data is available.
+  void OnData(JNIEnv* env, jobject obj, jint size, jint hardware_delay_bytes);
+
+  // Called from Java so that we can cache the address of the Java-managed
+  // |byte_buffer| in |direct_buffer_address_|.
+  void CacheDirectBufferAddress(JNIEnv* env, jobject obj, jobject byte_buffer);
+
+ private:
+  base::ThreadChecker thread_checker_;
+  AudioManagerAndroid* audio_manager_;
+
+  // Java AudioRecordInput instance.
+  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_;
+
+  DISALLOW_COPY_AND_ASSIGN(AudioRecordInputStream);
+};
+
+}  // namespace media
+
+#endif  // MEDIA_AUDIO_ANDROID_AUDIO_RECORD_INPUT_H_