--- a/dom/media/MemoryBlockCache.cpp
+++ b/dom/media/MemoryBlockCache.cpp
@@ -6,16 +6,20 @@
 
 #include "MemoryBlockCache.h"
 
 #include "MediaPrefs.h"
 #include "mozilla/Atomics.h"
 #include "mozilla/ClearOnShutdown.h"
 #include "mozilla/Logging.h"
 #include "mozilla/Telemetry.h"
+#include "mozilla/Services.h"
+#include "nsIObserver.h"
+#include "nsIObserverService.h"
+#include "nsWeakReference.h"
 #include "prsystem.h"
 
 namespace mozilla {
 
 #undef LOG
 LazyLogModule gMemoryBlockCacheLog("MemoryBlockCache");
 #define LOG(x, ...)                                                            \
   MOZ_LOG(gMemoryBlockCacheLog, LogLevel::Debug, ("%p " x, this, ##__VA_ARGS__))