Bug 1275541 - Undefine GetCurrentTime. r=padenot, r=jesup

MozReview-Commit-ID: 3LSadqoMKD3

--HG--
extra : rebase_source : 514892577c08251de1c2be0a7e3ca110497370d4

dom/media/MediaStreamGraph.h

@@ -520,6 +520,13 @@ struct TrackBound
  * for those objects in arbitrary order and the MediaStreamGraph has to be able
  * to handle this.
  */
+
+// GetCurrentTime is defined in winbase.h as zero argument macro forwarding to
+// GetTickCount() and conflicts with MediaStream::GetCurrentTime.
+#ifdef GetCurrentTime
+#undef GetCurrentTime
+#endif
+
 class MediaStream : public mozilla::LinkedListElement<MediaStream>
 {
 public: