fix(build): add missing return types now enforced by linter

modules/angular2/test/core/compiler/compiler_spec.ts

@@ -58,8 +58,9 @@ export function main() {
       rootProtoView = createRootProtoView(directiveResolver, MainComponent);
     });
 
-    function createCompiler(renderCompileResults: List<renderApi.ProtoViewDto>,
-                            protoViewFactoryResults: List<List<AppProtoView>>) {
+    function createCompiler(
+        renderCompileResults: List<renderApi.ProtoViewDto | Promise<renderApi.ProtoViewDto>>,
+        protoViewFactoryResults: List<List<AppProtoView>>) {
       var urlResolver = new UrlResolver();
       renderCompileRequests = [];
       renderCompiler.spy('compile').andCallFake((view) => {

modules/angular2/test/core/compiler/dynamic_component_loader_spec.ts

@@ -115,10 +115,9 @@ export function main() {
                            tc.detectChanges();
 
                            var newlyInsertedElement = DOM.childNodes(tc.nativeElement)[1];
-                           expect(newlyInsertedElement.id)
-                               .toEqual("new value")
-
-                                   async.done();
+                           expect((</*(#2770) HTMLElement*/ any>newlyInsertedElement).id)
+                               .toEqual("new value");
+                           async.done();
                          });
                    });
              }));
@@ -211,10 +210,10 @@ export function main() {
                               tc.detectChanges();
 
                               var newlyInsertedElement = DOM.nextSibling(tc.nativeElement);
-                              expect(newlyInsertedElement.id)
-                                  .toEqual("new value")
+                              expect((</*(#2770) HTMLElement*/ any>newlyInsertedElement).id)
+                                  .toEqual("new value");
 
-                                      async.done();
+                              async.done();
                             });
                       });
                 }));

modules/angular2/test/render/dom/dom_renderer_integration_spec.ts

@@ -107,10 +107,11 @@ export function main() {
 
                var el = DOM.childNodes(tb.rootEl)[0];
                tb.renderer.setElementProperty(elRef(cmpView.viewRef, 0), 'value', 'hello');
-               expect(el.value).toEqual('hello');
+               expect((</*(#2770) HTMLInputElement*/ any>el).value).toEqual('hello');
 
                tb.renderer.setElementClass(elRef(cmpView.viewRef, 0), 'a', true);
-               expect(DOM.childNodes(tb.rootEl)[0].value).toEqual('hello');
+               expect((</*(#2770) HTMLInputElement*/ any>DOM.childNodes(tb.rootEl)[0]).value)
+                   .toEqual('hello');
                tb.renderer.setElementClass(elRef(cmpView.viewRef, 0), 'a', false);
                expect(DOM.hasClass(el, 'a')).toBe(false);