Fix some JS style nits.

chrome/test/data/webui/mock_timer.js

Index: chrome/test/data/webui/mock_timer.js
diff --git a/chrome/test/data/webui/mock_timer.js b/chrome/test/data/webui/mock_timer.js
index ded92bdaa703f9af543ee9d373ab5bcce30622a7..37f5f6cfe130bb49606e90a2f4357270bd1d0dcb 100644
--- a/chrome/test/data/webui/mock_timer.js
+++ b/chrome/test/data/webui/mock_timer.js
@@ -9,7 +9,7 @@
 function MockTimer() {
   /**
    * Default versions of the timing functions.
-   * @type {Object.<string, !Function>}
+   * @type {Object<string, !Function>}
    * @private
    */
   this.originals_ = [];
@@ -25,7 +25,7 @@ function MockTimer() {
 
   /**
    * Details for active timers.
-   * @type {Array.<{callback: Function,
+   * @type {Array<{callback: Function,
    *                delay: number,
    *                key: number,
    *                repeats: boolean}>}
@@ -35,7 +35,7 @@ function MockTimer() {
 
   /**
    * List of scheduled tasks.
-   * @type {Array.<{when: number, key: number}>}
+   * @type {Array<{when: number, key: number}>}
    * @private
    */
   this.schedule_ = [];