Update AudioRenderer API to fire changes in BufferingState.

media/filters/pipeline_integration_test_base.cc

Index: media/filters/pipeline_integration_test_base.cc
diff --git a/media/filters/pipeline_integration_test_base.cc b/media/filters/pipeline_integration_test_base.cc
index 1fd5288e057b5b1a0021dd59c016c837309b89ef..899c6764fe98528d1bd531faa9b2c9c8bed09d5d 100644
--- a/media/filters/pipeline_integration_test_base.cc
+++ b/media/filters/pipeline_integration_test_base.cc
@@ -284,11 +284,8 @@ PipelineIntegrationTestBase::CreateFilterCollection(
                  base::Unretained(this),
                  decryptor),
       &hardware_config_);
-  // Disable underflow if hashing is enabled.
-  if (hashing_enabled_) {
+  if (hashing_enabled_)
     audio_sink_->StartAudioHashForTesting();
-    audio_renderer_impl->DisableUnderflowForTesting();

[scherkus (not reviewing), 2014/05/13 04:18:20]

note to self ... I need to verify if this still works

for example do we now need a Pipeline::DisableUnderflowForTesting()?

I kind of forget why this is in here

[DaleCurtis, 2014/05/13 17:54:00]

It's so frames aren't dropped which would mess up the hash.

-  }
   scoped_ptr<AudioRenderer> audio_renderer(audio_renderer_impl);
   collection->SetAudioRenderer(audio_renderer.Pass());