DOMUI prefs: Add and wire up a stub overlay for adding a startup page.

chrome/browser/resources/options.html

Index: chrome/browser/resources/options.html
diff --git a/chrome/browser/resources/options.html b/chrome/browser/resources/options.html
index 26d8534ed843b34a9467a512161b3d22fd2c3eec..f18566641bb37e5e455e60ab2cde0f21513c6f3e 100644
--- a/chrome/browser/resources/options.html
+++ b/chrome/browser/resources/options.html
@@ -31,6 +31,7 @@
 <script src="options/personal_options.js"></script>
 <script src="options/content_settings_ui.js"></script>
 <script src="options/content_settings.js"></script>
+<script src="options/add_startup_page_overlay.js"></script>
 <script src="options/clear_browser_data_overlay.js"></script>
 <script src="options/font_settings_overlay.js"></script>
 <script>
@@ -61,6 +62,7 @@ function load() {
   OptionsPage.register(PersonalOptions.getInstance());
   OptionsPage.register(AdvancedOptions.getInstance());
   OptionsPage.registerSubPage(ContentSettings.getInstance());
+  OptionsPage.registerOverlay(AddStartupPageOverlay.getInstance());
   OptionsPage.registerOverlay(ClearBrowserDataOverlay.getInstance());
   OptionsPage.registerOverlay(FontSettingsOverlay.getInstance());
 
@@ -116,6 +118,7 @@ window.onpopstate = function(e) {
 <div id="overlay" class="overlay hidden">
   <div id="overlayview">
     <button id="close-overlay" onclick="OptionsPage.clearOverlays();"></button>
+    <include src="options/add_startup_page_overlay.html">
     <include src="options/clear_browser_data_overlay.html">
     <include src="options/font_settings_overlay.html">
     <if expr="pp_ifdef('chromeos')">