Bug 1286454 part 4 - remove DecoderData::mDiscontinuity since it leads to nothing now; r=jwwang

MozReview-Commit-ID: I6Qzq1p6GyT

--HG--
extra : rebase_source : 796fa9611c31068cec69b631b26e542ae1cf4295

dom/media/MediaFormatReader.cpp

@@ -1320,14 +1320,8 @@ MediaFormatReader::Update(TrackType aTrack)
 void
 MediaFormatReader::ReturnOutput(MediaData* aData, TrackType aTrack)
 {
-  auto& decoder = GetDecoderData(aTrack);
-  MOZ_ASSERT(decoder.HasPromise());
+  MOZ_ASSERT(GetDecoderData(aTrack).HasPromise());
   MOZ_DIAGNOSTIC_ASSERT(aData->mType != MediaData::NULL_DATA);
-  if (decoder.mDiscontinuity) {
-    LOGV("Setting discontinuity flag");
-    decoder.mDiscontinuity = false;
-  }
-
   LOG("Resolved data promise for %s [%lld, %lld]", TrackTypeToStr(aTrack),
       aData->mTime, aData->GetEndTime());
 

dom/media/MediaFormatReader.h

@@ -242,7 +242,6 @@ private:
       , mDemuxEOS(false)
       , mWaitingForData(false)
       , mReceivedNewData(false)
-      , mDiscontinuity(true)
       , mDecoderInitialized(false)
       , mDecodingRequested(false)
       , mOutputRequested(false)
@@ -294,7 +293,6 @@ private:
     bool mDemuxEOS;
     bool mWaitingForData;
     bool mReceivedNewData;
-    bool mDiscontinuity;
 
     // Pending seek.
     MozPromiseRequestHolder<MediaTrackDemuxer::SeekPromise> mSeekRequest;
@@ -398,7 +396,6 @@ private:
       MOZ_ASSERT(mOwner->OnTaskQueue());
       mDemuxEOS = false;
       mWaitingForData = false;
-      mDiscontinuity = true;
       mQueuedSamples.Clear();
       mDecodingRequested = false;
       mOutputRequested = false;