Add a skeleton Start Page to the experimental app list.

chrome/browser/resources/app_list/start_page.css

 /* Copyright 2013 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. */
 
 html,
 body,
 #start-page {
-  background-color: rgb(245, 245, 245);
+  background-color: rgb(251, 251, 251);
   height: 100%;
   margin: 0;
   overflow: hidden;
   padding: 0;
   width: 100%;
 }
 
 #start-page {
   -webkit-align-items: stretch;
   -webkit-flex-direction: column;
   -webkit-justify-content: flex-start;
   -webkit-user-select: none;
   box-sizing: border-box;
   display: -webkit-flex;
   padding: 10px;
 }
 
+#logo {
+  background-image: -webkit-image-set(
+    url('chrome://theme/IDR_LOCAL_NTP_IMAGES_LOGO_PNG') 1x,
+    url('chrome://theme/IDR_LOCAL_NTP_IMAGES_LOGO_PNG@2x') 2x);
+  height: 95px;
+  margin: auto;
+  width: 269px;
+}
+
 <include src="recommended_apps.css"/>