Bug 1289976. Part 3 - Remove the IsShutdown() check from MediaDecoder::FireTimeUpdate(). r=kaku

FireTimeUpdate() is only called from UpdateLogicalPositionInternal() which returns early when IsShutdown() is true.

MozReview-Commit-ID: 4GZwrI85aXj

--HG--
extra : rebase_source : 9d7cbd571fd794369c833723ea5fc50a26380e51

dom/media/MediaDecoder.cpp

@@ -1675,9 +1675,7 @@ void
 MediaDecoder::FireTimeUpdate()
 {
   MOZ_ASSERT(NS_IsMainThread());
-  if (IsShutdown()) {
-    return;
-  }
+  MOZ_ASSERT(!IsShutdown());
   mOwner->FireTimeUpdate(true);
 }