Support configuring the audio buffer duration in the Pepper MediaStream API.

ppapi/tests/test_media_stream_audio_track.h

Index: ppapi/tests/test_media_stream_audio_track.h
diff --git a/ppapi/tests/test_media_stream_audio_track.h b/ppapi/tests/test_media_stream_audio_track.h
index b91fd26e7d2e4c3b2cbe3d426d0d20bd44177882..88148e8b3ce69d5185a524c176d5c7a5352a5d8d 100644
--- a/ppapi/tests/test_media_stream_audio_track.h
+++ b/ppapi/tests/test_media_stream_audio_track.h
@@ -24,6 +24,10 @@ class TestMediaStreamAudioTrack : public TestCase {
   // Overrides.
   virtual void HandleMessage(const pp::Var& message_data);
 
+  // Test helpers.
+  std::string CheckConfigure(int32_t attrib_list[], int32_t expected_result);
+  std::string CheckGetBuffer(int times, int expected_duration);
+
   std::string TestCreate();
   std::string TestGetBuffer();
   std::string TestConfigure();