chore: fix DDC errors / warnings

Closes #7195

modules/angular2/src/testing/e2e_util.ts

@@ -18,6 +18,6 @@ export function verifyNoBrowserErrors() {
       }
       return logEntry.level.value > webdriver.logging.Level.WARNING.value;
     });
-    expect(filteredLog.length).toEqual(0);
+    expect(filteredLog).toEqual([]);
   });
 }

modules/angular2/src/testing/test_component_builder.ts

@@ -254,8 +254,9 @@ export class TestComponentBuilder {
     DOM.appendChild(doc.body, rootEl);
 
 
-    return this._injector.get(DynamicComponentLoader)
-        .loadAsRoot(rootComponentType, `#${rootElId}`, this._injector)
-        .then((componentRef) => { return new ComponentFixture_(componentRef); });
+    var promise: Promise<ComponentRef> =
+        this._injector.get(DynamicComponentLoader)
+            .loadAsRoot(rootComponentType, `#${rootElId}`, this._injector);
+    return promise.then((componentRef) => { return new ComponentFixture_(componentRef); });
   }
 }