Bug 1371515. P3 - remove IsShutdown() which now has no callers. r=kaku

MozReview-Commit-ID: Te3F7WJ8iF

--HG--
extra : rebase_source : 5ed1fa5537f32d3e340ba61c2e1538ed23c007d7

dom/media/MediaDecoderStateMachine.cpp

@@ -3758,13 +3758,6 @@ void MediaDecoderStateMachine::PreservesPitchChanged()
   mMediaSink->SetPreservesPitch(mPreservesPitch);
 }
 
-bool
-MediaDecoderStateMachine::IsShutdown() const
-{
-  MOZ_ASSERT(OnTaskQueue());
-  return mIsShutdown;
-}
-
 TimeUnit
 MediaDecoderStateMachine::AudioEndTime() const
 {

dom/media/MediaDecoderStateMachine.h

@@ -305,9 +305,6 @@ private:
   bool HaveEnoughDecodedAudio();
   bool HaveEnoughDecodedVideo();
 
-  // True if shutdown process has begun.
-  bool IsShutdown() const;
-
   // Returns true if we're currently playing. The decoder monitor must
   // be held.
   bool IsPlaying() const;