[Chromoting] Enable jscompile for browser tests.

remoting/webapp/base/js/base.js

Index: remoting/webapp/base/js/base.js
diff --git a/remoting/webapp/base/js/base.js b/remoting/webapp/base/js/base.js
index 9f2d83d005c72dd6f092d5c26e712cdee8577dc7..a357fd933a4a72f8d1e9ef8a7c1a10d76d97ad20 100644
--- a/remoting/webapp/base/js/base.js
+++ b/remoting/webapp/base/js/base.js
@@ -375,14 +375,14 @@ base.EventSource = function() {};
  /**
   * Add a listener |fn| to listen to |type| event.
   * @param {string} type
-  * @param {function(?=):void} fn
+  * @param {Function} fn
   */
 base.EventSource.prototype.addEventListener = function(type, fn) {};
 
  /**
   * Remove a listener |fn| to listen to |type| event.
   * @param {string} type
-  * @param {function(?=):void} fn
+  * @param {Function} fn
   */
 base.EventSource.prototype.removeEventListener = function(type, fn) {};
 
@@ -431,7 +431,7 @@ base.EventSourceImpl.prototype = {
 
   /**
     * @param {string} type
-    * @param {function(?=):void} fn
+    * @param {Function} fn
     */
   addEventListener: function(type, fn) {
     base.debug.assert(typeof fn == 'function');
@@ -443,7 +443,7 @@ base.EventSourceImpl.prototype = {
 
   /**
     * @param {string} type
-    * @param {function(?=):void} fn
+    * @param {Function} fn
     */
   removeEventListener: function(type, fn) {
     base.debug.assert(typeof fn == 'function');