Return from |Configure()| asynchronously, and allow |InitBuffers()| to return errors.

ppapi/tests/test_media_stream_audio_track.cc

Index: ppapi/tests/test_media_stream_audio_track.cc
diff --git a/ppapi/tests/test_media_stream_audio_track.cc b/ppapi/tests/test_media_stream_audio_track.cc
index 05cb0bf3ad7e3c013c1af185ca2fd1c62e812d8e..efbe24ffe776310483d914c66e36ebac07cb4b35 100644
--- a/ppapi/tests/test_media_stream_audio_track.cc
+++ b/ppapi/tests/test_media_stream_audio_track.cc
@@ -204,6 +204,14 @@ std::string TestMediaStreamAudioTrack::TestConfigure() {
   ASSERT_FALSE(audio_track_.HasEnded());
   ASSERT_FALSE(audio_track_.GetId().empty());
 
+  // Do nothing.

[teravest, 2014/07/31 20:54:55]

What's this comment for?

[Anand Mistry (off Chromium), 2014/07/31 23:54:48]

Expanded.

+  {
+    int32_t attrib_list[] = {
+      PP_MEDIASTREAMAUDIOTRACK_ATTRIB_NONE,
+    };
+    ASSERT_SUBTEST_SUCCESS(CheckConfigure(attrib_list, PP_OK));
+  }
+
   // Configure number of buffers.
   struct {
     int32_t buffers;