[Chromoting] Enable jscompile for webapp unittests.

remoting/webapp/base/js/auth_init.js

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 'use strict';
 
 /** @suppress {duplicate} */
 var remoting = remoting || {};
 
 /**
@@ skipping 24 matching lines @@
     remoting.identity = /** @type {remoting.Identity} */ (oauth2);
     if (!remoting.identity.isAuthenticated()) {
       remoting.AuthDialog.getInstance().show().then(function() {
         remoting.oauth2.doAuthRedirect(function(){
           window.location.reload();
         });
       });
     }
   }
 
-  remoting.identity.getUserInfo().then(function(userInfo) {
-    onUserInfoAvailable(userInfo.email, userInfo.name);
-  }).catch(function(error) {
-    onGetIdentityInfoError(
-        /** @type {remoting.Error} */ (error));
-  });
+  remoting.identity.getUserInfo().then(
+      /** @param {{email:string, name:string}} userInfo */
+      function(userInfo) {
+        onUserInfoAvailable(userInfo.email, userInfo.name);
+      }).catch(function(error) {
+        onGetIdentityInfoError(
+            /** @type {remoting.Error} */ (error));
+      });
 };
 
 /**
  * Removes the cached token and restarts the app.
  *
  * @return {void}  Nothing.
  */
 remoting.handleAuthFailureAndRelaunch = function() {
   remoting.identity.removeCachedAuthToken().then(function(){
     if (base.isAppsV2()) {
       base.Ipc.invoke('remoting.ActivationHandler.restart',
                       chrome.app.window.current().id);
     } else {
       window.location.reload();
     }
   });
-};
+};