Bug 1309516 part 5 - remove unused MediaDecoderReaderWrapper::AwaitStartTime();r=jwwang

MozReview-Commit-ID: CcybQMPz47i

--HG--
extra : rebase_source : ccdf3ba70a93396998f0bf77b8b04e7a64e58838
extra : intermediate-source : c2ba16341576fa8bfe510f4d37b89ccc55456ff3
extra : source : 4de4162cce1bb37a5ab14c0506428be9b7e698ff

dom/media/MediaDecoderReaderWrapper.cpp

@@ -169,14 +169,6 @@ MediaDecoderReaderWrapper::ReadMetadata()
          ->CompletionPromise();
 }
 
-RefPtr<HaveStartTimePromise>
-MediaDecoderReaderWrapper::AwaitStartTime()
-{
-  MOZ_ASSERT(mOwnerThread->IsCurrentThreadIn());
-  MOZ_ASSERT(!mShutdown);
-  return mStartTimeRendezvous->AwaitStartTime();
-}
-
 void
 MediaDecoderReaderWrapper::RequestAudioData()
 {

dom/media/MediaDecoderReaderWrapper.h

@@ -52,7 +52,6 @@ public:
 
   media::TimeUnit StartTime() const;
   RefPtr<MetadataPromise> ReadMetadata();
-  RefPtr<HaveStartTimePromise> AwaitStartTime();
 
   decltype(mAudioCallback)& AudioCallback() { return mAudioCallback; }
   decltype(mVideoCallback)& VideoCallback() { return mVideoCallback; }