--- a/dom/base/Document.cpp
+++ b/dom/base/Document.cpp
@@ -14817,30 +14817,16 @@ void Document::NotifyUserGestureActivati
 bool Document::HasBeenUserGestureActivated() {
   RefPtr<BrowsingContext> bc = GetBrowsingContext();
   if (!bc) {
     return false;
   }
   return bc->GetUserGestureActivation();
 }
 
-void Document::MaybeNotifyAutoplayBlocked() {
-  Document* topLevelDoc = GetTopLevelContentDocument();
-  if (!topLevelDoc) {
-    return;
-  }
-
-  // This event is used to notify front-end side that we've blocked autoplay,
-  // so front-end side should show blocking icon as well.
-  RefPtr<AsyncEventDispatcher> asyncDispatcher = new AsyncEventDispatcher(
-      topLevelDoc, NS_LITERAL_STRING("GloballyAutoplayBlocked"),
-      CanBubble::eYes, ChromeOnlyDispatch::eYes);
-  asyncDispatcher->PostDOMEvent();
-}
-
 void Document::ClearUserGestureActivation() {
   if (!HasBeenUserGestureActivated()) {
     return;
   }
   RefPtr<BrowsingContext> bc = GetBrowsingContext();
   if (!bc) {
     return;
   }

--- a/dom/base/Document.h
+++ b/dom/base/Document.h
@@ -4112,20 +4112,16 @@ class Document : public nsINode,
    * element containing the subdocument containing aFrame, and/or find the
    * nearest non-anonymous ancestor in this document.
    * Returns null if there is no such element.
    */
   nsIContent* GetContentInThisDocument(nsIFrame* aFrame) const;
 
   void ReportShadowDOMUsage();
 
-  // When the doc is blocked permanantly, we would dispatch event to notify
-  // front-end side to show blocking icon.
-  void MaybeNotifyAutoplayBlocked();
-
   // Sets flags for media autoplay telemetry.
   void SetDocTreeHadAudibleMedia();
   void SetDocTreeHadPlayRevoked();
 
   dom::XPathEvaluator* XPathEvaluator();
 
   void MaybeInitializeFinalizeFrameLoaders();
 

--- a/dom/html/HTMLMediaElement.cpp
+++ b/dom/html/HTMLMediaElement.cpp
@@ -3871,22 +3871,36 @@ void HTMLMediaElement::DispatchEventsWhe
     DispatchAsyncEvent(NS_LITERAL_STRING("blocked"));
   }
 #if defined(MOZ_WIDGET_ANDROID)
   RefPtr<AsyncEventDispatcher> asyncDispatcher = new AsyncEventDispatcher(
       this, NS_LITERAL_STRING("MozAutoplayMediaBlocked"), CanBubble::eYes,
       ChromeOnlyDispatch::eYes);
   asyncDispatcher->PostDOMEvent();
 #endif
-  OwnerDoc()->MaybeNotifyAutoplayBlocked();
+  MaybeNotifyAutoplayBlocked();
   ReportToConsole(nsIScriptError::warningFlag, "BlockAutoplayError");
   mHasPlayEverBeenBlocked = true;
   mHasEverBeenBlockedForAutoplay = true;
 }
 
+void HTMLMediaElement::MaybeNotifyAutoplayBlocked() {
+  Document* topLevelDoc = OwnerDoc()->GetTopLevelContentDocument();
+  if (!topLevelDoc) {
+    return;
+  }
+
+  // This event is used to notify front-end side that we've blocked autoplay,
+  // so front-end side should show blocking icon as well.
+  RefPtr<AsyncEventDispatcher> asyncDispatcher = new AsyncEventDispatcher(
+      topLevelDoc, NS_LITERAL_STRING("GloballyAutoplayBlocked"),
+      CanBubble::eYes, ChromeOnlyDispatch::eYes);
+  asyncDispatcher->PostDOMEvent();
+}
+
 void HTMLMediaElement::PlayInternal(bool aHandlingUserInput) {
   if (mPreloadAction == HTMLMediaElement::PRELOAD_NONE) {
     // The media load algorithm will be initiated by a user interaction.
     // We want to boost the channel priority for better responsiveness.
     // Note this must be done before UpdatePreloadAction() which will
     // update |mPreloadAction|.
     mUseUrgentStartForChannel = true;
   }
@@ -6094,17 +6108,17 @@ void HTMLMediaElement::SuspendOrResumeEl
         DispatchPendingMediaEvents();
       }
       // If the media element has been blocked and isn't still allowed to play
       // when it comes back from the bfcache, we would notify front end to show
       // the blocking icon in order to inform user that the site is still being
       // blocked.
       if (mHasEverBeenBlockedForAutoplay &&
           !AutoplayPolicy::IsAllowedToPlay(*this)) {
-        OwnerDoc()->MaybeNotifyAutoplayBlocked();
+        MaybeNotifyAutoplayBlocked();
       }
     }
   }
 }
 
 bool HTMLMediaElement::IsBeingDestroyed() {
   Document* ownerDoc = OwnerDoc();
   nsIDocShell* docShell = ownerDoc ? ownerDoc->GetDocShell() : nullptr;

--- a/dom/html/HTMLMediaElement.h
+++ b/dom/html/HTMLMediaElement.h
@@ -1301,16 +1301,20 @@ class HTMLMediaElement : public nsGeneri
   // Calculate the audio track silence proportion and then report the telemetry
   // result. we would report the result when decoder is destroyed.
   void ReportAudioTrackSilenceProportionTelemetry();
 
   // When the play is not allowed, dispatch related events which are used for
   // testing or changing control UI.
   void DispatchEventsWhenPlayWasNotAllowed();
 
+  // When the doc is blocked permanantly, we would dispatch event to notify
+  // front-end side to show blocking icon.
+  void MaybeNotifyAutoplayBlocked();
+
   // The current decoder. Load() has been called on this decoder.
   // At most one of mDecoder and mSrcStream can be non-null.
   RefPtr<MediaDecoder> mDecoder;
 
   // The DocGroup-specific nsISerialEventTarget of this HTML element on the main
   // thread.
   nsCOMPtr<nsISerialEventTarget> mMainThreadEventTarget;