Bug 1274626 - Part 1 - add a method to HTMLMediaElement for debugging visibilty change; r=jwwang,ehsan

MozReview-Commit-ID: B1gAc0KfmCQ

dom/html/HTMLMediaElement.cpp

@@ -797,6 +797,17 @@ HTMLMediaElement::MozDumpDebugInfo()
   }
 }
 
+void
+HTMLMediaElement::SetVisible(bool aVisible)
+{
+  if (!mDecoder) {
+    return;
+  }
+
+  mDecoder->NotifyOwnerActivityChanged(aVisible);
+
+}
+
 already_AddRefed<DOMMediaStream>
 HTMLMediaElement::GetSrcObject() const
 {