Added Home, end, PageUp, PageDown support in the ChromeVox menu

chrome/browser/resources/chromeos/chromevox/cvox2/background/panel_menu.js

Index: chrome/browser/resources/chromeos/chromevox/cvox2/background/panel_menu.js
diff --git a/chrome/browser/resources/chromeos/chromevox/cvox2/background/panel_menu.js b/chrome/browser/resources/chromeos/chromevox/cvox2/background/panel_menu.js
index d94914cc95c64be2f4468eed54396cf05dac01cc..50e0753d37d0643691dfd0fb5a69b4995ce4d2b5 100644
--- a/chrome/browser/resources/chromeos/chromevox/cvox2/background/panel_menu.js
+++ b/chrome/browser/resources/chromeos/chromevox/cvox2/background/panel_menu.js
@@ -169,6 +169,22 @@ PanelMenu.prototype = {
   },
 
   /**
+   * Sets the active menu item index to be 0.
+   */
+  scrollToTop: function() {
+    this.activeIndex_ = 0;
+    this.items_[this.activeIndex_].element.focus();
+  },
+
+  /**
+   * Sets the active menu item index to be the last index.
+   */
+  scrollToBottom: function() {
+    this.activeIndex_ = this.items_.length - 1;
+    this.items_[this.activeIndex_].element.focus();
+  },
+
+  /**
    * Get the callback for the active menu item.
    * @return {Function} The callback.
    */