[ntp4] Apply style tweaks so that bookmarks page scrolls correctly.

chrome/browser/resources/ntp4/bookmarks_page.css

 /* Copyright (c) 2011 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.
  */
 
 /* Bookmark Tiles ************************************************************/
 
 .bookmark {
   display: -webkit-box;
   position: absolute;
@@ skipping 92 matching lines @@
   border-bottom: 1px solid rgba(0, 0, 0, 0.1);
   color: #777;
   display: -webkit-box;
   font-size: 16px;
   height: 48px;
   line-height: 48px;
   overflow: hidden;
   white-space: nowrap;
 }
 
+/* Add padding to tile page content to adjust for title wrapper. */
+.bookmarks-page .tile-page-content {
+  padding-bottom: 48px;
+}
+
 #bookmarks-title-wrapper .title-crumb {
   cursor: pointer;
   margin: 0 25px;
 }
 
 #bookmarks-title-wrapper .title-crumb-active {
   color: #7f7f7f;
   cursor: default;
   font-weight: bold;
   margin-right: 0;
@@ skipping 18 matching lines @@
   -webkit-box-flex: 1;
 }
 
 .bookmark-separator {
   background: -webkit-canvas(bookmark-chevron) center center no-repeat;
   border: 0;
   height: 44px;
   margin: 2px 0;
   width: 10px;
 }