feat(ngModel): support the input[type="search"] field

Closes #466

lib/directive/ng_model.dart

@@ -189,6 +189,7 @@ class InputCheckboxDirective {
 @NgDirective(selector: 'input[type=url][ng-model]')
 @NgDirective(selector: 'input[type=email][ng-model]')
 @NgDirective(selector: 'input[type=number][ng-model]')
+@NgDirective(selector: 'input[type=search][ng-model]')
 class InputTextLikeDirective {
   final dom.Element inputElement;
   final NgModel ngModel;

test/directive/ng_model_spec.dart

@@ -185,7 +185,7 @@ describe('ng-model', () {
     }));
   });
 
-  describe('type="textarea"', () {
+  describe('textarea', () {
     it('should update textarea value from model', inject(() {
       _.compile('<textarea ng-model="model">');
       _.rootScope.$digest();
@@ -296,6 +296,44 @@ describe('ng-model', () {
       expect(blueBtn.checked).toBe(false);
     }));
   });
+
+  describe('type="search"', () {
+    it('should update input value from model', inject(() {
+      _.compile('<input type="search" ng-model="model">');
+      _.rootScope.$digest();
+
+      expect((_.rootElement as dom.InputElement).value).toEqual('');
+
+      _.rootScope.$apply('model = "matias"');
+      expect((_.rootElement as dom.InputElement).value).toEqual('matias');
+    }));
+
+    it('should render null as the empty string', inject(() {
+      _.compile('<input type="search" ng-model="model">');
+      _.rootScope.$digest();
+
+      expect((_.rootElement as dom.InputElement).value).toEqual('');
+
+      _.rootScope.$apply('model = null');
+      expect((_.rootElement as dom.InputElement).value).toEqual('');
+    }));
+
+    it('should update model from the input value', inject(() {
+      _.compile('<input type="search" ng-model="model" probe="p">');
+      Probe probe = _.rootScope.p;
+      var ngModel = probe.directive(NgModel);
+      InputElement inputElement = probe.element;
+
+      inputElement.value = 'xzy';
+      _.triggerEvent(inputElement, 'change');
+      expect(_.rootScope.model).toEqual('xzy');
+
+      inputElement.value = '123';
+      var input = probe.directive(InputTextLikeDirective);
+      input.processValue();
+      expect(_.rootScope.model).toEqual('123');
+    }));
+  });
 
   describe('contenteditable', () {
     it('should update content from model', inject(() {