Bug 1397793 - Remove mRate from MediaEngineDefault and use GraphRate(). r=pehrsons

MozReview-Commit-ID: D9x3wICAMNA

--HG--
extra : rebase_source : 1b83343c8a459d8720a6445efbd0d390824325e4
extra : source : ea8d6efcf3efbadab838c3f720d4ad73e7afed2e

dom/media/webrtc/MediaEngineDefault.cpp

@@ -417,7 +417,7 @@ MediaEngineDefaultAudioSource::Start(SourceMediaStream* aStream, TrackID aID,
 
   // AddTrack will take ownership of segment
   AudioSegment* segment = new AudioSegment();
-  aStream->AddAudioTrack(aID, mRate, 0, segment, SourceMediaStream::ADDTRACK_QUEUED);
+  aStream->AddAudioTrack(aID, aStream->GraphRate(), 0, segment, SourceMediaStream::ADDTRACK_QUEUED);
 
   // Remember TrackID so we can finish later
   mTrackID = aID;
@@ -473,7 +473,7 @@ MediaEngineDefaultAudioSource::NotifyPull(MediaStreamGraph* aGraph,
   MOZ_ASSERT(aID == mTrackID);
   AudioSegment segment;
   // avoid accumulating rounding errors
-  TrackTicks desired = aSource->TimeToTicksRoundUp(mRate, aDesiredTime);
+  TrackTicks desired = aSource->TimeToTicksRoundUp(aGraph->GraphRate(), aDesiredTime);
   TrackTicks delta = desired - mLastNotify;
   mLastNotify += delta;
   AppendToSegment(segment, delta, aPrincipalHandle);

dom/media/webrtc/MediaEngineDefault.h

@@ -188,7 +188,6 @@ protected:
   TrackID mTrackID;
 
   TrackTicks mLastNotify; // Accessed in ::Start(), then on NotifyPull (from MSG thread)
-  TrackRate mRate; // ditto
   uint32_t mFreq; // ditto
 
   // Created on Start, then accessed from NotifyPull (MSG thread)