Clean up straggler classes to use embedded signin in page in the new profiles world.

chrome/browser/ui/webui/options/sync_setup_handler.cc

Index: chrome/browser/ui/webui/options/sync_setup_handler.cc
diff --git a/chrome/browser/ui/webui/options/sync_setup_handler.cc b/chrome/browser/ui/webui/options/sync_setup_handler.cc
index d541af5ed770500ca6a61cc4065eadf157111650..66d18d2e3dd4a754df47ae5c7ef4e177b6acd6b2 100644
--- a/chrome/browser/ui/webui/options/sync_setup_handler.cc
+++ b/chrome/browser/ui/webui/options/sync_setup_handler.cc
@@ -382,6 +382,7 @@ void SyncSetupHandler::DisplayGaiaLoginInNewTabOrWindow() {
                                  error_controller->error_account_id());
     }
   } else {
+    ProfileMetrics::LogSigninSource(signin::SOURCE_SETTINGS);
     if (switches::IsNewAvatarMenu() && !force_new_tab) {
       browser->window()->ShowAvatarBubbleFromAvatarButton(
           BrowserWindow::AVATAR_BUBBLE_MODE_SIGNIN,