From 0b39451aa9d2342faa193ad17f63ed58c7cb9d96 Mon Sep 17 00:00:00 2001
From: Eric Rahm <erahm@mozilla.com>
Date: Tue, 23 May 2017 15:14:07 -0700
Subject: [PATCH] Bug 1307212 - Stop warning about z-levels. r=froydnj

MozReview-Commit-ID: 2OughbymcrU
---
 xpfe/appshell/nsWindowMediator.cpp | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/xpfe/appshell/nsWindowMediator.cpp b/xpfe/appshell/nsWindowMediator.cpp
index 962eb1f275fe..a9d0c1d3bc5d 100644
--- a/xpfe/appshell/nsWindowMediator.cpp
+++ b/xpfe/appshell/nsWindowMediator.cpp
@@ -613,12 +613,10 @@ nsWindowMediator::GetZLevel(nsIXULWindow *aWindow, uint32_t *_retval)
 {
   NS_ENSURE_ARG_POINTER(_retval);
   *_retval = nsIXULWindow::normalZ;
+  // This can fail during window destruction.
   nsWindowInfo *info = GetInfoFor(aWindow);
   if (info) {
     *_retval = info->mZLevel;
-  } else {
-    NS_WARNING("getting z level of unregistered window");
-    // this goes off during window destruction
   }
   return NS_OK;
 }