[ntp4] Fix last page persist state for bookmarks page.

BUG=90889
TEST=Select Bookmarks page in NTP4, close tab, re-open, bookmarks should be the visible page.
Review URL: http://codereview.chromium.org/7640009

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@96487 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/resources/ntp4/new_tab.js

@@ -388,6 +388,8 @@ cr.define('ntp4', function() {
       cardSlider.selectCardByValue(mostVisitedPage);
     else if (shownPage == templateData['apps_page_id'])
       cardSlider.selectCardByValue(appsPages[shownPageIndex]);
+    else if (shownPage == templateData['bookmarks_page_id'])
+      cardSlider.selectCardByValue(bookmarksPage);
   }
 
   /**