Fix TS errors.

Author: crisbeto

src/lib/dialog/dialog.spec.ts

@@ -11,10 +11,11 @@ import {By} from '@angular/platform-browser';
 import {NgModule, Component, Directive, ViewChild, ViewContainerRef, Injector} from '@angular/core';
 import {MdDialogModule} from './index';
 import {MdDialog} from './dialog';
-import {OverlayContainer} from '../core';
+import {OverlayContainer, ESCAPE} from '../core';
 import {MdDialogRef} from './dialog-ref';
 import {MdDialogContainer} from './dialog-container';
 
+const FAKE_ESCAPE_KEY = { keyCode: ESCAPE } as KeyboardEvent;
 
 describe('MdDialog', () => {
   let dialog: MdDialog;
@@ -128,7 +129,7 @@ describe('MdDialog', () => {
         viewContainerFixture.debugElement.query(By.directive(MdDialogContainer)).componentInstance;
 
     // Fake the user pressing the escape key by calling the handler directly.
-    dialogContainer._handleEscapeKey();
+    dialogContainer._handleKeydown(FAKE_ESCAPE_KEY);
     viewContainerFixture.detectChanges();
 
     viewContainerFixture.whenStable().then(() => {
@@ -347,7 +348,7 @@ describe('MdDialog', () => {
           By.directive(MdDialogContainer)).componentInstance;
 
       // Fake the user pressing the escape key by calling the handler directly.
-      dialogContainer._handleEscapeKey();
+      dialogContainer._handleKeydown(FAKE_ESCAPE_KEY);
 
       expect(overlayContainerElement.querySelector('md-dialog-container')).toBeTruthy();
     });