Adding audio unit tests for Android

media/audio/android/audio_manager_android.h

 // 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.
 
 #ifndef MEDIA_AUDIO_ANDROID_AUDIO_MANAGER_ANDROID_H_
 #define MEDIA_AUDIO_ANDROID_AUDIO_MANAGER_ANDROID_H_
 
 #include "base/android/jni_android.h"
+#include "base/gtest_prod_util.h"
 #include "media/audio/audio_manager_base.h"
 
 namespace media {
 
 // Android implemention of AudioManager.
 class MEDIA_EXPORT AudioManagerAndroid : public AudioManagerBase {
  public:
   AudioManagerAndroid();
 
   // Implementation of AudioManager.
   virtual bool HasAudioOutputDevices() OVERRIDE;
   virtual bool HasAudioInputDevices() OVERRIDE;
-  virtual void GetAudioInputDeviceNames(media::AudioDeviceNames* device_names)
-      OVERRIDE;
+  virtual void GetAudioInputDeviceNames(
+      media::AudioDeviceNames* device_names) OVERRIDE;
   virtual AudioParameters GetInputStreamParameters(
       const std::string& device_id) OVERRIDE;
 
   virtual AudioOutputStream* MakeAudioOutputStream(
       const AudioParameters& params,
       const std::string& device_id,
       const std::string& input_device_id) OVERRIDE;
   virtual AudioInputStream* MakeAudioInputStream(
-      const AudioParameters& params, const std::string& device_id) OVERRIDE;
+      const AudioParameters& params,
+      const std::string& device_id) OVERRIDE;
   virtual void ReleaseOutputStream(AudioOutputStream* stream) OVERRIDE;
   virtual void ReleaseInputStream(AudioInputStream* stream) OVERRIDE;
 
   // Implementation of AudioManagerBase.
   virtual AudioOutputStream* MakeLinearOutputStream(
       const AudioParameters& params) OVERRIDE;
   virtual AudioOutputStream* MakeLowLatencyOutputStream(
       const AudioParameters& params,
       const std::string& device_id,
       const std::string& input_device_id) OVERRIDE;
   virtual AudioInputStream* MakeLinearInputStream(
-      const AudioParameters& params, const std::string& device_id) OVERRIDE;
+      const AudioParameters& params,
+      const std::string& device_id) OVERRIDE;
   virtual AudioInputStream* MakeLowLatencyInputStream(
-      const AudioParameters& params, const std::string& device_id) OVERRIDE;
+      const AudioParameters& params,
+      const std::string& device_id) OVERRIDE;
 
   static bool RegisterAudioManager(JNIEnv* env);
 
  protected:
   virtual ~AudioManagerAndroid();
 
   virtual AudioParameters GetPreferredOutputStreamParameters(
       const std::string& output_device_id,
       const AudioParameters& input_params) OVERRIDE;
 
  private:
   void SetAudioMode(int mode);
   void RegisterHeadsetReceiver();
   void UnregisterHeadsetReceiver();
   int GetNativeOutputSampleRate();
   bool IsAudioLowLatencySupported();
   int GetAudioLowLatencyOutputFrameSize();
   int GetOptimalOutputFrameSize(int sample_rate, int channels);
 
+  // Allow the AudioAndroidTest to access private methods.
+  FRIEND_TEST_ALL_PREFIXES(AudioAndroidTest, IsAudioLowLatencySupported);
+
   // Java AudioManager instance.
   base::android::ScopedJavaGlobalRef<jobject> j_audio_manager_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioManagerAndroid);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_AUDIO_ANDROID_AUDIO_MANAGER_ANDROID_H_