Add a Pepper audio basic functionality unit test.

chrome/browser/renderer_host/mock_render_process_host.cc

Index: chrome/browser/renderer_host/mock_render_process_host.cc
diff --git a/chrome/browser/renderer_host/mock_render_process_host.cc b/chrome/browser/renderer_host/mock_render_process_host.cc
index b18cc50d8bb0f23029e8f49514f79c88e80ff685..7319c99afc658bac9706aa55bfa2cb08bae01c65 100644
--- a/chrome/browser/renderer_host/mock_render_process_host.cc
+++ b/chrome/browser/renderer_host/mock_render_process_host.cc
@@ -73,14 +73,14 @@ bool MockRenderProcessHost::FastShutdownIfPossible() {
 
 bool MockRenderProcessHost::SendWithTimeout(IPC::Message* msg, int timeout_ms) {
   // Save the message in the sink. Just ignore timeout_ms.
-  sink_.OnMessageReceived(*msg);
+  sink_.Send(msg);
   delete msg;
   return true;
 }
 
 bool MockRenderProcessHost::Send(IPC::Message* msg) {
   // Save the message in the sink.
-  sink_.OnMessageReceived(*msg);
+  sink_.Send(msg);
   delete msg;
   return true;
 }