From 13e195c59411c5340c661b2d98ea0c01294caba2 Mon Sep 17 00:00:00 2001
From: Olli Pettay <Olli.Pettay@helsinki.fi>
Date: Fri, 2 Feb 2018 13:25:26 +0200
Subject: [PATCH] Bug 1434580 - Ensure proper mouseover handling. r=masayuki,
 a=RyanVM

--HG--
extra : source : bfd4bdfd40b43d0491c66af5b599659427e4e795
extra : intermediate-source : 8660689b18cd25f0110276bfc5bb8e8dd9c325f9
---
 dom/events/EventStateManager.cpp | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/dom/events/EventStateManager.cpp b/dom/events/EventStateManager.cpp
index 659629066c..c23cdb5751 100644
--- a/dom/events/EventStateManager.cpp
+++ b/dom/events/EventStateManager.cpp
@@ -4151,9 +4151,10 @@ EventStateManager::NotifyMouseOver(WidgetMouseEvent* aMouseEvent,
   // content associated with our subdocument.
   EnsureDocument(mPresContext);
   if (nsIDocument *parentDoc = mDocument->GetParentDocument()) {
-    if (nsIContent *docContent = parentDoc->FindContentForSubDocument(mDocument)) {
+    if (nsCOMPtr<nsIContent> docContent =
+          parentDoc->FindContentForSubDocument(mDocument)) {
       if (nsIPresShell *parentShell = parentDoc->GetShell()) {
-        EventStateManager* parentESM =
+        RefPtr<EventStateManager> parentESM =
           parentShell->GetPresContext()->EventStateManager();
         parentESM->NotifyMouseOver(aMouseEvent, docContent);
       }