Typecheck chrome://help using CompilerPass.java, everything except dependency to options

chrome/browser/resources/help/help_page.js

Index: chrome/browser/resources/help/help_page.js
diff --git a/chrome/browser/resources/help/help_page.js b/chrome/browser/resources/help/help_page.js
index 704febbf8d2e3f4d07ad8ab0d5c9385b63d14f8d..5f52508d39fe4a08ef92e33521b18fbcef90529e 100644
--- a/chrome/browser/resources/help/help_page.js
+++ b/chrome/browser/resources/help/help_page.js
@@ -187,7 +187,7 @@ cr.define('help', function() {
     /**
      * Assigns |method| to the onclick property of |el| if |el| exists.
      * @param {HTMLElement} el The element on which to set the click handler.
-     * @param {function} method The click handler.
+     * @param {Function} method The click handler.
      * @private
      */
     maybeSetOnClick_: function(el, method) {