refactor(NgModel): make sure the pattern validator uses the $validators pipeline

Author: matsko

src/ng/directive/input.js

@@ -990,16 +990,16 @@ function textInputType(scope, element, attr, ctrl, $sniffer, $browser) {
 
   if (pattern) {
     var validateRegex = function(regexp, value) {
-      return validate(ctrl, 'pattern', ctrl.$isEmpty(value) || regexp.test(value), value);
+      return ctrl.$isEmpty(value) || regexp.test(value);
     };
     match = pattern.match(/^\/(.*)\/([gim]*)$/);
     if (match) {
       pattern = new RegExp(match[1], match[2]);
-      patternValidator = function(value) {
+      ctrl.$validators.pattern = function(value) {
         return validateRegex(pattern, value);
       };
     } else {
-      patternValidator = function(value) {
+      ctrl.$validators.pattern = function(value) {
         var patternObj = scope.$eval(pattern);
 
         if (!patternObj || !patternObj.test) {
@@ -1010,9 +1010,6 @@ function textInputType(scope, element, attr, ctrl, $sniffer, $browser) {
         return validateRegex(patternObj, value);
       };
     }
-
-    ctrl.$formatters.push(patternValidator);
-    ctrl.$parsers.push(patternValidator);
   }
 
   // min length validator