Bug 1261299 - Add EnsureDocument(mPresContext) to EventStateManager::GetFocusedContent() because mDocument is lazily loaded. r=smaug

MozReview-Commit-ID: FGfb709o32f

--HG--
extra : rebase_source : f29037efd2666ba7bfce71d030bccad7188eadc9

dom/events/EventStateManager.cpp

@@ -5101,6 +5101,7 @@ nsIContent*
 EventStateManager::GetFocusedContent()
 {
   nsIFocusManager* fm = nsFocusManager::GetFocusManager();
+  EnsureDocument(mPresContext);
   if (!fm || !mDocument)
     return nullptr;