Convert chrome://extensions to a settings page within the options pages.

chrome/browser/resources/options/options.js

Index: chrome/browser/resources/options/options.js
===================================================================
--- chrome/browser/resources/options/options.js	(revision 99349)
+++ chrome/browser/resources/options/options.js	(working copy)
@@ -14,6 +14,7 @@
 var ContentSettingsExceptionsArea =
     options.contentSettings.ContentSettingsExceptionsArea;
 var CookiesView = options.CookiesView;
+var ExtensionSettings = options.ExtensionSettings;
 var FontSettings = options.FontSettings;
 var HandlerOptions = options.HandlerOptions;
 var ImportDataOverlay = options.ImportDataOverlay;
@@ -21,6 +22,7 @@
 var InstantConfirmOverlay = options.InstantConfirmOverlay;
 var LanguageOptions = options.LanguageOptions;
 var OptionsPage = options.OptionsPage;
+var PackExtensionOverlay = options.PackExtensionOverlay;
 var PasswordManager = options.PasswordManager;
 var PersonalOptions = options.PersonalOptions;
 var Preferences = options.Preferences;
@@ -166,6 +168,10 @@
   OptionsPage.registerOverlay(ManageProfileOverlay.getInstance(),
                               PersonalOptions.getInstance());
 
+  OptionsPage.register(ExtensionSettings.getInstance());
+  OptionsPage.registerOverlay(PackExtensionOverlay.getInstance(),
+                              ExtensionSettings.getInstance());
+
   if (cr.isChromeOS) {
     OptionsPage.register(AccountsOptions.getInstance());
     OptionsPage.registerSubPage(ProxyOptions.getInstance(),