Bug 1417442 - P1. Don't attempt to initialize MediaPrefs in the GPU process. r=dvander

MozReview-Commit-ID: 66766Tx8vgM

--HG--
extra : rebase_source : 43e37d4fc43d51f5e9f185a30965800d2f4f7830

widget/GfxInfoBase.cpp

@@ -591,7 +591,10 @@ GfxInfoBase::Init()
 {
   InitGfxDriverInfoShutdownObserver();
   gfxPrefs::GetSingleton();
-  MediaPrefs::GetSingleton();
+  if (!XRE_IsGPUProcess()) {
+    // MediaPrefs can't run in the GPU process.
+    MediaPrefs::GetSingleton();
+  }
 
   nsCOMPtr<nsIObserverService> os = mozilla::services::GetObserverService();
   if (os) {