Backed out changeset 68cf1028779b (bug 640117) because it doesn't build on Mac.

--HG--
extra : rebase_source : f20813c808b98e3e0e8c79cb0f08acc4006297d2

dom/ipc/AudioParent.cpp

@@ -159,7 +159,7 @@ AudioParent::Notify(nsITimer* timer)
 
   NS_ASSERTION(mStream, "AudioStream not initialized.");
   PRInt64 offset = mStream->GetSampleOffset();
-  unused << SendSampleOffsetUpdate(offset, PR_IntervalNow());
+  SendSampleOffsetUpdate(offset, PR_IntervalNow());
   return NS_OK;
 }