[Chromoting] Use compact notation for javascript @private types

remoting/webapp/app_remoting/js/idle_detector.js

Index: remoting/webapp/app_remoting/js/idle_detector.js
diff --git a/remoting/webapp/app_remoting/js/idle_detector.js b/remoting/webapp/app_remoting/js/idle_detector.js
index 9d6c58bcfcdcb782714eac9b4ac2299763e3cf65..c92d94aed91b61fc8e7e92a9c95805425bc6ee0c 100644
--- a/remoting/webapp/app_remoting/js/idle_detector.js
+++ b/remoting/webapp/app_remoting/js/idle_detector.js
@@ -38,16 +38,12 @@ remoting.IdleDetector = function(idleWarning, callback) {
   this.callback_ = callback;
 
   /**
-   * @type {number?} The id of the running timer, or null if no timer is
+   * @private {number?} The id of the running timer, or null if no timer is
    *     running.
-   * @private
    */
   this.timerId_ = null;
 
-  /**
-   * @type {?function():void}
-   * @private
-   */
+  /** @private {?function():void} */
   this.resetTimeoutRef_ = null;
 
   var manifest = chrome.runtime.getManifest();