Bug 1282710 - part 2 - Plumb the visibility event from nsIFrame to nsIDOMMediaElemnt; r=seth

MozReview-Commit-ID: DnlTghYdrug

--HG--
extra : transplant_source : N%9D%E9%7F2%14%92%A4%03%5E%801%2Bh%2C%BD%0F%20%98%0D

layout/generic/nsVideoFrame.cpp

@@ -665,15 +665,16 @@ nsVideoFrame::OnVisibilityChange(Visibility aOldVisibility,
                                  Visibility aNewVisibility,
                                  Maybe<OnNonvisible> aNonvisibleAction)
 {
-  nsCOMPtr<nsIImageLoadingContent> imageLoader = do_QueryInterface(mPosterImage);
-  if (!imageLoader) {
-    nsContainerFrame::OnVisibilityChange(aOldVisibility, aNewVisibility,
-                                         aNonvisibleAction);
-    return;
+  if (HasVideoElement()) {
+    nsCOMPtr<nsIDOMHTMLMediaElement> mediaDomElement = do_QueryInterface(mContent);
+    mediaDomElement->OnVisibilityChange(aOldVisibility, aNewVisibility);
   }
 
-  imageLoader->OnVisibilityChange(aOldVisibility, aNewVisibility,
-                                  aNonvisibleAction);
+  nsCOMPtr<nsIImageLoadingContent> imageLoader = do_QueryInterface(mPosterImage);
+  if (imageLoader) {
+    imageLoader->OnVisibilityChange(aOldVisibility, aNewVisibility,
+                                    aNonvisibleAction);
+  }
 
   nsContainerFrame::OnVisibilityChange(aOldVisibility, aNewVisibility,
                                        aNonvisibleAction);