Add bookmark promo to NTP on first run.

chrome/common/pref_names.cc

Index: chrome/common/pref_names.cc
===================================================================
--- chrome/common/pref_names.cc	(revision 52977)
+++ chrome/common/pref_names.cc	(working copy)
@@ -440,6 +440,11 @@
 // done directly from the omnibox should be shown.
 const wchar_t kShowOmniboxSearchHint[] = L"browser.show_omnibox_search_hint";
 
+// Int which specifies how many times left to show a promotional message on the
+// NTP.  This value decrements each time the NTP is shown for the first time
+// in a session.
+const wchar_t kNTPPromoViewsRemaining[] = L"browser.ntp.promo_remaining";
+
 // The list of origins which are allowed|denied to show desktop notifications.
 const wchar_t kDesktopNotificationDefaultContentSetting[] =
     L"profile.notifications_default_content_setting";