diff --git a/dom/html/HTMLMediaElement.cpp b/dom/html/HTMLMediaElement.cpp
index a624012f33..bd3775d828 100644
--- a/dom/html/HTMLMediaElement.cpp
+++ b/dom/html/HTMLMediaElement.cpp
@@ -2081,7 +2081,6 @@ HTMLMediaElement::HTMLMediaElement(already_AddRefed<mozilla::dom::NodeInfo>& aNo
   if (!gMediaElementEventsLog) {
     gMediaElementEventsLog = PR_NewLogModule("nsMediaElementEvents");
   }
-  EnsureStateWatchingLog();
 #endif
   ErrorResult rv;
 
diff --git a/dom/media/MediaDecoder.cpp b/dom/media/MediaDecoder.cpp
index 0d82462647..61bc9eed81 100644
--- a/dom/media/MediaDecoder.cpp
+++ b/dom/media/MediaDecoder.cpp
@@ -116,10 +116,21 @@ public:
 
 StaticRefPtr<MediaMemoryTracker> MediaMemoryTracker::sUniqueInstance;
 
+PRLogModuleInfo* gStateWatchingLog;
+PRLogModuleInfo* gMediaPromiseLog;
+PRLogModuleInfo* gMediaTimerLog;
+
 void
 MediaDecoder::InitStatics()
 {
   AbstractThread::InitStatics();
+
+  // Log modules.
+#ifdef PR_LOGGING
+  gMediaDecoderLog = PR_NewLogModule("MediaDecoder");
+#endif
+  gMediaPromiseLog = PR_NewLogModule("MediaPromise");
+  gStateWatchingLog = PR_NewLogModule("StateWatching");
 }
 
 NS_IMPL_ISUPPORTS(MediaMemoryTracker, nsIMemoryReporter)
@@ -611,12 +622,6 @@ MediaDecoder::MediaDecoder() :
   MOZ_COUNT_CTOR(MediaDecoder);
   MOZ_ASSERT(NS_IsMainThread());
   MediaMemoryTracker::AddMediaDecoder(this);
-#ifdef PR_LOGGING
-  if (!gMediaDecoderLog) {
-    gMediaDecoderLog = PR_NewLogModule("MediaDecoder");
-  }
-  EnsureStateWatchingLog();
-#endif
 
   // Initialize canonicals.
   mPlayState.Init(AbstractThread::MainThread(), PLAY_STATE_LOADING, "MediaDecoder::mPlayState (Canonical)");
diff --git a/dom/media/MediaDecoderReader.cpp b/dom/media/MediaDecoderReader.cpp
index 19c50df0c3..ca1b452d5c 100644
--- a/dom/media/MediaDecoderReader.cpp
+++ b/dom/media/MediaDecoderReader.cpp
@@ -33,25 +33,6 @@ extern PRLogModuleInfo* gMediaDecoderLog;
 #define DECODER_WARN(x, ...) \
   DECODER_WARN_HELPER(0, (nsPrintfCString("Decoder=%p " x, mDecoder, ##__VA_ARGS__).get()))
 
-PRLogModuleInfo* gMediaPromiseLog;
-PRLogModuleInfo* gStateWatchingLog;
-
-void
-EnsureMediaPromiseLog()
-{
-  if (!gMediaPromiseLog) {
-    gMediaPromiseLog = PR_NewLogModule("MediaPromise");
-  }
-}
-
-void
-EnsureStateWatchingLog()
-{
-  if (!gStateWatchingLog) {
-    gStateWatchingLog = PR_NewLogModule("StateWatching");
-  }
-}
-
 class VideoQueueMemoryFunctor : public nsDequeFunctor {
 public:
   VideoQueueMemoryFunctor() : mSize(0) {}
@@ -95,8 +76,6 @@ MediaDecoderReader::MediaDecoderReader(AbstractMediaDecoder* aDecoder)
   , mVideoDiscontinuity(false)
 {
   MOZ_COUNT_CTOR(MediaDecoderReader);
-  EnsureMediaPromiseLog();
-  EnsureStateWatchingLog();
 }
 
 MediaDecoderReader::~MediaDecoderReader()
diff --git a/dom/media/StateWatching.h b/dom/media/StateWatching.h
index e0bcebfb24..001107a635 100644
--- a/dom/media/StateWatching.h
+++ b/dom/media/StateWatching.h
@@ -58,8 +58,6 @@ namespace mozilla {
 
 extern PRLogModuleInfo* gStateWatchingLog;
 
-void EnsureStateWatchingLog();
-
 #define WATCH_LOG(x, ...) \
   MOZ_ASSERT(gStateWatchingLog); \
   PR_LOG(gStateWatchingLog, PR_LOG_DEBUG, (x, ##__VA_ARGS__))