Show sync promo at startup

chrome/common/pref_names.cc

Index: chrome/common/pref_names.cc
diff --git a/chrome/common/pref_names.cc b/chrome/common/pref_names.cc
index 6da55344be94a3f63ba797629bdd77372108f46a..025419ecd9fb8b353274030fce57459970ecae32 100644
--- a/chrome/common/pref_names.cc
+++ b/chrome/common/pref_names.cc
@@ -1118,6 +1118,9 @@ const char kShouldUseMinimalFirstRunBubble[] = "show-minimal-first-run-bubble";
 // Signal that we should show the welcome page when we launch Chrome.
 const char kShouldShowWelcomePage[] = "show-welcome-page";
 
+// Tracks the number of times that we have shown the sync promo at startup.
+const char kSyncPromoStartupCount[] = "sync-promo-startup-count";
+
 // String containing the last known Google URL.  We re-detect this on startup in
 // most cases, and use it to send traffic to the correct Google host or with the
 // correct Google domain/country code for whatever location the user is in.