[extensions] Don't let clicks on <a href="#"> links escape un-prevented.

chrome/browser/resources/extensions/extensions.js

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-<include src="../shared/js/cr/ui/drag_wrapper.js"></include>
 <include src="../uber/uber_utils.js"></include>
 <include src="extension_commands_overlay.js"></include>
 <include src="extension_focus_manager.js"></include>
 <include src="extension_list.js"></include>
 <include src="pack_extension_overlay.js"></include>
 
 // Used for observing function of the backend datasource for this page by
 // tests.
 var webui_responded_ = false;
 
@@ skipping 93 matching lines @@
           this.handleExtensionCommandsConfig_.bind(this));
 
       // Initialize the Commands overlay.
       var extensionCommandsOverlay =
           extensions.ExtensionCommandsOverlay.getInstance();
       extensionCommandsOverlay.initializePage();
 
       cr.ui.overlay.setupOverlay($('dropTargetOverlay'));
 
       extensions.ExtensionFocusManager.getInstance().initialize();
+
+      preventPoundLinkClicks();  // From shared/js/util.js.
     },
 
     /**
      * Handles the Load Unpacked Extension button.
      * @param {Event} e Change event.
      * @private
      */
     handleLoadUnpackedExtension_: function(e) {
       chrome.send('extensionSettingsLoadUnpackedExtension');
 
@@ skipping 15 matching lines @@
 
     /**
      * Handles the Configure (Extension) Commands link.
      * @param {Event} e Change event.
      * @private
      */
     handleExtensionCommandsConfig_: function(e) {
       ExtensionSettings.showOverlay($('extensionCommandsOverlay'));
       chrome.send('coreOptionsUserMetricsAction',
                   ['Options_ExtensionCommands']);
-      e.preventDefault();
     },
 
     /**
      * Handles the Update Extension Now button.
      * @param {Event} e Change event.
      * @private
      */
     handleUpdateExtensionNow_: function(e) {
       chrome.send('extensionSettingsAutoupdate');
     },
@@ skipping 168 matching lines @@
   return {
     ExtensionSettings: ExtensionSettings
   };
 });
 
 var ExtensionSettings = extensions.ExtensionSettings;
 
 window.addEventListener('load', function(e) {
   ExtensionSettings.getInstance().initialize();
 });