Refactor android specific code in AudioManagerBase class.

media/audio/audio_manager_base.h

Index: media/audio/audio_manager_base.h
===================================================================
--- media/audio/audio_manager_base.h	(revision 194203)
+++ media/audio/audio_manager_base.h	(working copy)
@@ -20,10 +20,6 @@
 #include "base/win/scoped_com_initializer.h"
 #endif
 
-#if defined(OS_ANDROID)
-#include "base/android/jni_android.h"
-#endif
-
 namespace base {
 class Thread;
 }
@@ -97,10 +93,6 @@
   virtual AudioParameters GetInputStreamParameters(
       const std::string& device_id) OVERRIDE;
 
-#if defined(OS_ANDROID)
-  static bool RegisterAudioManager(JNIEnv* env);
-#endif
-
  protected:
   AudioManagerBase();
 
@@ -136,16 +128,14 @@
   // from the audio thread (no locking).
   AudioOutputDispatchersMap output_dispatchers_;
 
+  // Get number of input or output streams.
+  int input_stream_count() { return num_input_streams_; }
+  int output_stream_count() { return num_output_streams_; }
+
  private:
   // Called by Shutdown().
   void ShutdownOnAudioThread();
 
-#if defined(OS_ANDROID)
-  void SetAudioMode(int mode);
-  void RegisterHeadsetReceiver();
-  void UnregisterHeadsetReceiver();
-#endif
-
   // Counts the number of active input streams to find out if something else
   // is currently recording in Chrome.
   base::AtomicRefCount num_active_input_streams_;
@@ -175,11 +165,6 @@
   // and GetMessageLoop() starts returning NULL.
   scoped_refptr<base::MessageLoopProxy> message_loop_;
 
-#if defined(OS_ANDROID)
-  // Java AudioManager instance.
-  base::android::ScopedJavaGlobalRef<jobject> j_audio_manager_;
-#endif
-
   DISALLOW_COPY_AND_ASSIGN(AudioManagerBase);
 };