chore($location): use `$window` instead of `window`

Fix one place were there was a reference to `window` and not to `$window`

src/ng/location.js

@@ -788,8 +788,8 @@ function $LocationProvider() {
    * @param {string=} oldState History state object that was before it was changed.
    */
 
-  this.$get = ['$rootScope', '$browser', '$sniffer', '$rootElement',
-      function($rootScope, $browser, $sniffer, $rootElement) {
+  this.$get = ['$rootScope', '$browser', '$sniffer', '$rootElement', '$window',
+      function($rootScope, $browser, $sniffer, $rootElement, $window) {
     var $location,
         LocationMode,
         baseHref = $browser.baseHref(), // if base[href] is undefined, it defaults to ''
@@ -871,7 +871,7 @@ function $LocationProvider() {
           if ($location.absUrl() != $browser.url()) {
             $rootScope.$apply();
             // hack to work around FF6 bug 684208 when scenario runner clicks on links
-            window.angular['ff-684208-preventDefault'] = true;
+            $window.angular['ff-684208-preventDefault'] = true;
           }
         }
       }