[Chromoting] Enable jscompile for webapp unittests.

remoting/webapp/base/js/ipc.js

Index: remoting/webapp/base/js/ipc.js
diff --git a/remoting/webapp/base/js/ipc.js b/remoting/webapp/base/js/ipc.js
index a940a28fc1b959a0c7d4b3f48c33c87eea55d8e9..955d15036f5a9f03a00d8940c43729eb8a8e7b64 100644
--- a/remoting/webapp/base/js/ipc.js
+++ b/remoting/webapp/base/js/ipc.js
@@ -89,7 +89,7 @@ base.Ipc.Request_ = function(methodName, 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.
@@ -145,8 +145,8 @@ base.Ipc.prototype.onMessage_ = function(message, sender, sendResponse) {
  *
  * @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);