msie: documentMode detection to replace userAgent sniffing

docs/component-spec/mocks.js

@@ -1,5 +1,5 @@
 // Copy/pasted from src/Angular.js, so that we can disable specific tests on IE.
-var msie = parseInt((/msie (\d+)/.exec(navigator.userAgent.toLowerCase()) || [])[1], 10);
+var msie = document.documentMode;
 
 var createMockWindow = function() {
   var mockWindow = {};

src/Angular.js

@@ -75,13 +75,9 @@ var /** holds major version number for IE or NaN for real browsers */
     uid               = ['0', '0', '0'];
 
 /**
- * IE 11 changed the format of the UserAgent string.
- * See http://msdn.microsoft.com/en-us/library/ms537503.aspx
+ * document.documentMode is IE specific and returns IE document Mode for current page.
  */
-msie = int((/msie (\d+)/.exec(lowercase(navigator.userAgent)) || [])[1]);
-if (isNaN(msie)) {
-  msie = int((/trident\/.*; rv:(\d+)/.exec(lowercase(navigator.userAgent)) || [])[1]);
-}
+msie = document.documentMode;
 
 
 /**

src/ngScenario/browserTrigger.js

@@ -1,7 +1,7 @@
 'use strict';
 
 (function() {
-  var msie = parseInt((/msie (\d+)/.exec(navigator.userAgent.toLowerCase()) || [])[1], 10);
+  var msie = document.documentMode;
 
   function indexOf(array, obj) {
     if (array.indexOf) return array.indexOf(obj);

test/ngTouch/directive/ngSwipeSpec.js

@@ -17,7 +17,7 @@ var swipeTests = function(description, restrictBrowsers, startEvent, moveEvent,
     // Skip tests on IE < 9. These versions of IE don't support createEvent(), and so
     // we cannot control the (x,y) position of events.
     // It works fine in IE 8 under manual testing.
-    var msie = +((/msie (\d+)/.exec(navigator.userAgent.toLowerCase()) || [])[1]);
+    var msie = document.documentMode;
     if (msie < 9) {
       return;
     }

test/ngTouch/swipeSpec.js

@@ -17,7 +17,7 @@ var swipeTests = function(description, restrictBrowsers, startEvent, moveEvent,
     // Skip tests on IE < 9. These versions of IE don't support createEvent(), and so
     // we cannot control the (x,y) position of events.
     // It works fine in IE 8 under manual testing.
-    var msie = +((/msie (\d+)/.exec(navigator.userAgent.toLowerCase()) || [])[1]);
+    var msie = document.documentMode;
     if (msie < 9) {
       return;
     }