Sync Promo: Remember promo expanded state

chrome/browser/ui/webui/ntp/new_tab_sync_setup_handler.cc

Index: chrome/browser/ui/webui/ntp/new_tab_sync_setup_handler.cc
diff --git a/chrome/browser/ui/webui/ntp/new_tab_sync_setup_handler.cc b/chrome/browser/ui/webui/ntp/new_tab_sync_setup_handler.cc
index 10362418a29c7ca4f1bfd8676cb58f9d8338781d..ba21e557757e60b5547e49234f4a00e720d334c9 100644
--- a/chrome/browser/ui/webui/ntp/new_tab_sync_setup_handler.cc
+++ b/chrome/browser/ui/webui/ntp/new_tab_sync_setup_handler.cc
@@ -82,17 +82,23 @@ void NewTabSyncSetupHandler::HandleInitializeSyncPromo(const ListValue* args) {
 
   // If the user has not signed into sync then expand the sync promo.
   // TODO(sail): Need to throttle this behind a server side flag.
-  if (!service->HasSyncSetupCompleted())
+  if (!service->HasSyncSetupCompleted() &&
+      web_ui_->GetProfile()->GetPrefs()->GetBoolean(
+          prefs::kSyncPromoExpanded)) {
     OpenSyncSetup();
+    SaveExpandedPreference(true);
+  }
 }
 
 void NewTabSyncSetupHandler::HandleCollapseSyncPromo(const ListValue* args) {
   CloseSyncSetup();
+  SaveExpandedPreference(false);
 }
 
 
 void NewTabSyncSetupHandler::HandleExpandSyncPromo(const ListValue* args) {
   OpenSyncSetup();
+  SaveExpandedPreference(true);
 }
 
 void NewTabSyncSetupHandler::UpdateLogin() {
@@ -102,3 +108,9 @@ void NewTabSyncSetupHandler::UpdateLogin() {
   web_ui_->CallJavascriptFunction("new_tab.NewTabSyncPromo.updateLogin",
                                   string_value);
 }
+
+void NewTabSyncSetupHandler::SaveExpandedPreference(bool is_expanded) {
+  web_ui_->GetProfile()->GetPrefs()->SetBoolean(prefs::kSyncPromoExpanded,
+                                                is_expanded);
+  web_ui_->GetProfile()->GetPrefs()->ScheduleSavePersistentPrefs();
+}