style(*): IE is a real browser, and chakra is pretty solid

- IE9+ do not have issues with Function.prototype.bind() on builtin fns (asked Brian Terlson)
  (NOTE: there may still be corner cases where builtins will not have `bind()` --- this may
  need to be reverted on complaint).
- HTMLScriptElement#text is an IDL-spec'd attribute, and we use it in all cases --- so the
  comment was sort of nonsense.
- The value of `msie` does not depend on whether the user is using a "real" browser or not.

Closes #10242

Author: caitp

src/Angular.js

@@ -162,8 +162,8 @@ if ('i' !== 'I'.toLowerCase()) {
 }
 
 
-var /** holds major version number for IE or NaN for real browsers */
-    msie,
+var
+    msie,             // holds major version number for IE, or NaN if UA is not IE.
     jqLite,           // delay binding since jQuery could be loaded after us.
     jQuery,           // delay binding
     slice             = [].slice,

src/ng/directive/script.js

@@ -40,7 +40,6 @@ var scriptDirective = ['$templateCache', function($templateCache) {
     compile: function(element, attr) {
       if (attr.type == 'text/ng-template') {
         var templateUrl = attr.id,
-            // IE is not consistent, in scripts we have to read .text but in other nodes we have to read .textContent
             text = element[0].text;
 
         $templateCache.put(templateUrl, text);

src/ng/parse.js

@@ -722,12 +722,7 @@ Parser.prototype = {
       ensureSafeObject(context, expressionText);
       ensureSafeFunction(fn, expressionText);
 
-      // IE stupidity! (IE doesn't have apply for some native functions)
-      var v = fn.apply
-            ? fn.apply(context, args)
-            : fn(args[0], args[1], args[2], args[3], args[4]);
-
-      return ensureSafeObject(v, expressionText);
+      return ensureSafeObject(fn.apply(context, args), expressionText);
     };
   },