Fix some JS style nits.

components/chrome_apps/webstore_widget/app/main.js

Index: components/chrome_apps/webstore_widget/app/main.js
diff --git a/components/chrome_apps/webstore_widget/app/main.js b/components/chrome_apps/webstore_widget/app/main.js
index 2495c5e0abd17e24a53e7a5d33dd957daa9ed2ef..9c93dc03a14208c3691e4345c863af51f97e7350 100644
--- a/components/chrome_apps/webstore_widget/app/main.js
+++ b/components/chrome_apps/webstore_widget/app/main.js
@@ -18,7 +18,7 @@
 
 /**
  * @type {?{
- *   filter: !Object.<string, *>,
+ *   filter: !Object<string, *>,
  *   webstoreUrl: ?string
  * }}
  */
@@ -53,7 +53,7 @@ function getString(id) {
 }
 
 /**
- * @param {Object.<string, string>} strings Localized strings used by the
+ * @param {Object<string, string>} strings Localized strings used by the
  *     container.
  * @return {!CWSWidgetContainer.PlatformDelegate}
  */
@@ -98,7 +98,7 @@ function createPlatformDelegate(strings) {
           });
     },
 
-    /** @param {function(Array.<string>)} callback */
+    /** @param {function(Array<string>)} callback */
     getInstalledItems: function(callback) { callback([]); },
 
     /**