update(dialog, toast): add support for .parent( ) method

Refs #1350
Closes #1767.

src/components/dialog/dialog.js

@@ -331,7 +331,7 @@ function MdDialogProvider($$interimElementProvider) {
 
   return $$interimElementProvider('$mdDialog')
     .setDefaults({
-      methods: ['disableParentScroll', 'hasBackdrop', 'clickOutsideToClose', 'escapeToClose', 'targetEvent'],
+      methods: ['disableParentScroll', 'hasBackdrop', 'clickOutsideToClose', 'escapeToClose', 'targetEvent', 'parent'],
       options: dialogDefaultOptions
     })
     .addPreset('alert', {

src/components/dialog/dialog.spec.js

@@ -23,9 +23,9 @@ describe('$mdDialog', function() {
       var parent = angular.element('<div>');
       var resolved = false;
       $mdDialog.show(
-        $mdDialog.alert({
-          parent: parent
-        })
+        $mdDialog
+          .alert()
+          .parent( parent )
           .title('Title')
           .content('Hello world')
           .theme('some-theme')

src/components/toast/toast.js

@@ -173,12 +173,12 @@ function MdToastProvider($$interimElementProvider) {
   var activeToastContent;
   var $mdToast = $$interimElementProvider('$mdToast')
     .setDefaults({
-      methods: ['position', 'hideDelay', 'capsule'],
+      methods: ['position', 'hideDelay', 'capsule' ],
       options: toastDefaultOptions
     })
     .addPreset('simple', {
       argOption: 'content',
-      methods: ['content', 'action', 'highlightAction', 'theme'],
+      methods: ['content', 'action', 'highlightAction', 'theme', 'parent'],
       options: /* @ngInject */ function($mdToast, $mdTheming) {
         var opts = {
           template: [

src/components/toast/toast.spec.js

@@ -91,6 +91,25 @@ describe('$mdToast service', function() {
         expect(content.text()).toBe('Do something');
         expect(button.text()).toBe('Click me');
       }));
+
+
+      it('displays correctly with parent()', inject(function($mdToast, $rootScope) {
+              var parent = angular.element('<div>');
+              var toast = $mdToast.simple({
+                content: 'Do something',
+              })
+              .parent(parent)
+              .action('Click me');
+
+              $mdToast.show(toast);
+              $rootScope.$digest();
+
+              var content = parent.find('span').eq(0);
+              var button = parent.find('button');
+
+              expect(content.text()).toBe('Do something');
+              expect(button.text()).toBe('Click me');
+            }));
     });
 
     function hasConfigMethods(methods) {

src/core/services/interimElement/interimElement.spec.js

@@ -49,7 +49,7 @@ describe('$$interimElement service', function() {
 
         var builder = interimTest.build();
         [ 'controller', 'controllerAs', 'onRemove', 'onShow', 'resolve', 
-          'template', 'templateUrl', 'themable', 'transformTemplate'
+          'template', 'templateUrl', 'themable', 'transformTemplate', 'parent'
         ].forEach(function(methodName) {
           expect(builder[methodName]).toBeOfType('function');
         });