Bug 1477200 - Temporarily bump audio input and output latency on OSX as a stop-gap measure, on macbook pros. r=pehrsons

MozReview-Commit-ID: 3kD3ZRT2fDf

--HG--
extra : rebase_source : 675c1a729953ab3d6ef52bb165787b151136c3f3

dom/media/GraphDriver.cpp

@@ -597,7 +597,9 @@ bool IsMacbookOrMacbookAir()
         return true;
       }
     }
-    return false;
+    // Bug 1477200, we're temporarily capping the latency to 512 here to help
+    // with audio quality.
+    return true;
   }
 #endif
   return false;