[Chromoting] Enable jscompile for webapp unittests.

remoting/webapp/base/js/ipc.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.
 
 /**
 * @fileoverview
 *
 * In Chrome Apps, some platform APIs can only be called from the background
 * page (e.g. reloading a chrome.app.AppWindow).  Likewise, some chrome API's
 * must be initiated by user interaction, which can only be called from the
@@ skipping 71 matching lines @@
  * @private
  */
 base.Ipc.Request_ = function(methodName, params) {
   this.methodName = methodName;
   this.params = params;
 };
 
 
 /**
  * @param {string} methodName
- * @param {function(...?)} handler The handler can be invoked by calling
+ * @param {Function} handler The handler can be invoked by calling
  *   base.Ipc.invoke(|methodName|, arg1, arg2, ...)
  * Async handlers that return promises are currently not supported.
  * @return {boolean} Whether the handler is successfully registered.
  */
 base.Ipc.prototype.register = function(methodName, handler) {
   if (methodName in this.handlers_) {
     console.error('service ' + methodName + ' is already registered.');
     return false;
   }
   this.handlers_[methodName] = handler;
@@ skipping 35 matching lines @@
   } catch (/** @type {Error} */ e) {
     sendResponse({error: e.message});
   }
 };
 
 /**
  * Invokes a method on a remote page
  *
  * @param {string} methodName
  * @param {...} var_args
- * @return A Promise that would resolve to the return value of the handler or
- *   reject if the handler throws an exception.
+ * @return {Promise} A Promise that would resolve to the return value of the
+ *   handler or reject if the handler throws an exception.
  */
 base.Ipc.invoke = function(methodName, var_args) {
   var params = Array.prototype.slice.call(arguments, 1);
   var sendMessage = base.Promise.as(
       chrome.runtime.sendMessage,
       [null, new base.Ipc.Request_(methodName, params)]);
 
   return sendMessage.then(
     /** @param {?{error: Error}} response */
     function(response) {
@@ skipping 18 matching lines @@
 };
 
 base.Ipc.deleteInstance = function() {
   if (instance_) {
     instance_.dispose_();
     instance_ = null;
   }
 };
 
 })();