Add RecommendSampleRate to audio config test.

ppapi/tests/test_audio_config.cc

Index: ppapi/tests/test_audio_config.cc
===================================================================
--- ppapi/tests/test_audio_config.cc	(revision 142004)
+++ ppapi/tests/test_audio_config.cc	(working copy)
@@ -37,6 +37,13 @@
     4096
   };
 
+  // Ask PPB_AudioConfig about the recommended sample rate.

[viettrungluu, 2012/06/15 21:33:17]

Please add a separate test for this ("TestRecommendSampleRate"?).

+  PP_AudioSampleRate sample_rate = audio_config_interface_->RecommendSampleRate(
+      instance_->pp_instance());
+  ASSERT_TRUE(sample_rate == PP_AUDIOSAMPLERATE_NONE ||
+              sample_rate == PP_AUDIOSAMPLERATE_44100 ||
+              sample_rate == PP_AUDIOSAMPLERATE_48000);
+
   for (size_t i = 0; i < sizeof(kSampleRates)/sizeof(kSampleRates[0]); i++) {
     PP_AudioSampleRate sample_rate = kSampleRates[i];