From 9eb8169458a5f24d5ebb92d1d3ea8878316ae160 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Fabrice=20Desr=C3=A9?= <fabrice@mozilla.com>
Date: Fri, 2 May 2014 14:56:18 -0700
Subject: [PATCH] Bug 1003836 - Don't use createEvent("TouchEvent") to check if
 TouchEvents are supported r=smaug

---
 dom/browser-element/BrowserElementPanning.js | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/dom/browser-element/BrowserElementPanning.js b/dom/browser-element/BrowserElementPanning.js
index dabed75e3a02..22a26d6abc2b 100644
--- a/dom/browser-element/BrowserElementPanning.js
+++ b/dom/browser-element/BrowserElementPanning.js
@@ -50,9 +50,9 @@ const ContentPanning = {
   },
 
   _setupListenersForPanning: function cp_setupListenersForPanning() {
-    var events;
-    try {
-      content.document.createEvent('TouchEvent');
+    let events;
+
+    if (content.TouchEvent) {
       events = ['touchstart', 'touchend', 'touchmove'];
       this.watchedEventsType = 'touch';
 #ifdef MOZ_WIDGET_GONK
@@ -65,7 +65,7 @@ const ContentPanning = {
                            .processType == Ci.nsIXULRuntime.PROCESS_TYPE_DEFAULT;
       this.hybridEvents = isParentProcess;
 #endif
-    } catch(e) {
+    } else {
       // Touch events aren't supported, so fall back on mouse.
       events = ['mousedown', 'mouseup', 'mousemove'];
       this.watchedEventsType = 'mouse';