--- a/dom/media/MediaCache.cpp
+++ b/dom/media/MediaCache.cpp
@@ -1641,32 +1641,32 @@ MediaCache::OpenStream(MediaCacheStream*
   NS_ASSERTION(NS_IsMainThread(), "Only call on main thread");
 
   ReentrantMonitorAutoEnter mon(mReentrantMonitor);
   LOG("Stream %p opened", aStream);
   mStreams.AppendElement(aStream);
   aStream->mResourceID = AllocateResourceID();
 
   // Queue an update since a new stream has been opened.
-  gMediaCache->QueueUpdate();
+  QueueUpdate();
 }
 
 void
 MediaCache::ReleaseStream(MediaCacheStream* aStream)
 {
   NS_ASSERTION(NS_IsMainThread(), "Only call on main thread");
 
   ReentrantMonitorAutoEnter mon(mReentrantMonitor);
   LOG("Stream %p closed", aStream);
   mStreams.RemoveElement(aStream);
 
   // Update MediaCache again for |mStreams| is changed.
   // We need to re-run Update() to ensure streams reading from the same resource
   // as the removed stream get a chance to continue reading.
-  gMediaCache->QueueUpdate();
+  QueueUpdate();
 }
 
 void
 MediaCache::ReleaseStreamBlocks(MediaCacheStream* aStream)
 {
   mReentrantMonitor.AssertCurrentThreadIn();
 
   // XXX scanning the entire stream doesn't seem great, if not much of it