Changes to default apps promo per ui leads:

chrome/browser/extensions/default_apps.h

Index: chrome/browser/extensions/default_apps.h
diff --git a/chrome/browser/extensions/default_apps.h b/chrome/browser/extensions/default_apps.h
index a8b162c0021cc370f1388079338baeb8921c391f..2ff880135fdde6ef8232b856e76d674c39812029 100644
--- a/chrome/browser/extensions/default_apps.h
+++ b/chrome/browser/extensions/default_apps.h
@@ -19,7 +19,9 @@ class PrefService;
 // - Whether to show the apps promo in the launcher
 class DefaultApps {
  public:
-  // The maximum number of times to show the apps promo.
+  // The maximum number of times to show the apps promo. The promo counter
+  // actually goes up to this number + 1 because we need to differentiate
+  // between the first time we overflow and subsequent times.
   static const int kAppsPromoCounterMax;
 
   // Register our preferences.
@@ -42,15 +44,12 @@ class DefaultApps {
   //
   // NOTE: If the default apps have been installed, but |installed_ids| is
   // different than GetDefaultApps(), this will permanently expire the promo.
-  bool ShouldShowPromo(const ExtensionIdSet& installed_ids);
+  bool ShouldShowPromo(const ExtensionIdSet& installed_ids, bool* just_expired);
 
   // Should be called after each app is installed. Once installed_ids contains
   // all the default apps, GetAppsToInstall() will start returning NULL.
   void DidInstallApp(const ExtensionIdSet& installed_ids);
 
-  // Should be called after each time the promo is installed.
-  void DidShowPromo();
-
   // Force the promo to be hidden.
   void SetPromoHidden();