fix(compiler): correctly type event handler proxy functions

modules/@angular/compiler-cli/integrationtest/src/features.ts

@@ -7,7 +7,8 @@
  */
 
 import * as common from '@angular/common';
-import {CUSTOM_ELEMENTS_SCHEMA, Component, Inject, NgModule, OpaqueToken} from '@angular/core';
+import {CUSTOM_ELEMENTS_SCHEMA, Component, Directive, EventEmitter, Inject, NgModule, OpaqueToken, Output} from '@angular/core';
+import {Observable} from 'rxjs/Observable';
 
 import {wrapInArray} from './funcs';
 
@@ -51,6 +52,28 @@ export class CompUsingPipes {
 export class CompUsingCustomElements {
 }
 
+@Component({
+  selector: 'cmp-event',
+  template: `
+    <div (click)="handleDomEventVoid($event)"></div>
+    <div (click)="handleDomEventPreventDefault($event)"></div>
+    <div (dirEvent)="handleDirEvent($event)"></div>
+  `,
+})
+export class CompConsumingEvents {
+  handleDomEventVoid(e: any): void {}
+  handleDomEventPreventDefault(e: any): boolean { return false; }
+  handleDirEvent(e: any): void {}
+}
+
+@Directive({
+  selector: '[dirEvent]',
+})
+export class DirPublishingEvents {
+  @Output('dirEvent')
+  dirEvent: Observable<string> = new EventEmitter();
+}
+
 @NgModule({schemas: [CUSTOM_ELEMENTS_SCHEMA], declarations: wrapInArray(CompUsingCustomElements)})
 export class ModuleUsingCustomElements {
 }