Bug 1233648 - Fix some insufficient includes. r=kinetik.

dom/media/MediaEventSource.h

@@ -9,6 +9,7 @@
 
 #include "mozilla/AbstractThread.h"
 #include "mozilla/Atomics.h"
+#include "mozilla/IndexSequence.h"
 #include "mozilla/Mutex.h"
 #include "mozilla/Tuple.h"
 #include "mozilla/TypeTraits.h"

dom/media/mediasink/VideoSink.cpp

@@ -4,6 +4,7 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
+#include "MediaQueue.h"
 #include "VideoSink.h"
 
 namespace mozilla {