fix(input): call $setTouched in blur asynchronously if necessary

If the model is blurred during an apply it should trigger
$setTouched asynchronously.

Fixes #8762
Fixes #9808
Closes #10014

Author: alexanderchan

src/ng/directive/input.js

@@ -2497,7 +2497,7 @@ var NgModelController = ['$scope', '$exceptionHandler', '$attrs', '$element', '$
      </file>
  * </example>
  */
-var ngModelDirective = function() {
+var ngModelDirective = ['$rootScope', function($rootScope) {
   return {
     restrict: 'A',
     require: ['ngModel', '^?form', '^?ngModelOptions'],
@@ -2541,15 +2541,17 @@ var ngModelDirective = function() {
           element.on('blur', function(ev) {
             if (modelCtrl.$touched) return;
 
-            scope.$apply(function() {
-              modelCtrl.$setTouched();
-            });
+            if ($rootScope.$$phase) {
+              scope.$evalAsync(modelCtrl.$setTouched);
+            } else {
+              scope.$apply(modelCtrl.$setTouched);
+            }
           });
         }
       };
     }
   };
-};
+}];
 
 
 /**

test/ng/directive/inputSpec.js

@@ -1280,6 +1280,32 @@ describe('ngModel', function() {
     dealoc(element);
   }));
 
+  it('should digest asynchronously on "blur" event if a apply is already in progress',
+      inject(function($compile, $rootScope) {
+
+    var element = $compile('<form name="myForm">' +
+                             '<input name="myControl" ng-model="value" >' +
+                           '</form>')($rootScope);
+    var inputElm = element.find('input');
+    var control = $rootScope.myForm.myControl;
+
+    $rootScope.$apply(function() {
+      expect(control.$touched).toBe(false);
+      expect(control.$untouched).toBe(true);
+
+      browserTrigger(inputElm, 'blur');
+
+      expect(control.$touched).toBe(false);
+      expect(control.$untouched).toBe(true);
+    });
+
+    expect(control.$touched).toBe(true);
+    expect(control.$untouched).toBe(false);
+
+    dealoc(element);
+  }));
+
+
   it('should register/deregister a nested ngModel with parent form when entering or leaving DOM',
       inject(function($compile, $rootScope) {