Bug 1328547. part 2 - remove checks for IsShutdown() which is false in DecodingState. r=kaku

MozReview-Commit-ID: CmU79bt4XoR

--HG--
extra : rebase_source : 4580449f41a23924d887ff4f1d28cecf0ed77ee9

dom/media/MediaDecoderStateMachine.cpp

@@ -1998,13 +1998,13 @@ DecodingState::Enter()
 
   mOnAudioPopped = AudioQueue().PopEvent().Connect(
     OwnerThread(), [this] () {
-    if (!mMaster->IsShutdown() && mMaster->NeedToDecodeAudio()) {
+    if (mMaster->NeedToDecodeAudio()) {
       mMaster->EnsureAudioDecodeTaskQueued();
     }
   });
   mOnVideoPopped = VideoQueue().PopEvent().Connect(
     OwnerThread(), [this] () {
-    if (!mMaster->IsShutdown() && mMaster->NeedToDecodeVideo()) {
+    if (mMaster->NeedToDecodeVideo()) {
       mMaster->EnsureVideoDecodeTaskQueued();
     }
   });