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

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

Index: chrome/browser/ui/webui/ntp/ntp_login_handler.cc
diff --git a/chrome/browser/ui/webui/ntp/ntp_login_handler.cc b/chrome/browser/ui/webui/ntp/ntp_login_handler.cc
index c28c0fe64496be109c21802c6a9dd70870f6b2d9..e9b8a9a3f7027547cf41f369fcc0ea97ce03bcc5 100644
--- a/chrome/browser/ui/webui/ntp/ntp_login_handler.cc
+++ b/chrome/browser/ui/webui/ntp/ntp_login_handler.cc
@@ -135,10 +135,10 @@ void NTPLoginHandler::HandleShowSyncLoginUI(const base::ListValue* args) {
     return;
 
   // The user isn't signed in, show the sign in promo.
-  signin::Source source =
+  signin_metrics::Source source =
       web_contents->GetURL().spec() == chrome::kChromeUIAppsURL ?
-          signin::SOURCE_APPS_PAGE_LINK :
-          signin::SOURCE_NTP_LINK;
+          signin_metrics::SOURCE_APPS_PAGE_LINK :
+          signin_metrics::SOURCE_NTP_LINK;
   chrome::ShowBrowserSignin(browser, source);
   RecordInHistogram(NTP_SIGN_IN_PROMO_CLICKED);
 }
@@ -167,7 +167,7 @@ void NTPLoginHandler::HandleShowAdvancedLoginUI(const base::ListValue* args) {
   Browser* browser =
       chrome::FindBrowserWithWebContents(web_ui()->GetWebContents());
   if (browser)
-    chrome::ShowBrowserSignin(browser, signin::SOURCE_NTP_LINK);
+    chrome::ShowBrowserSignin(browser, signin_metrics::SOURCE_NTP_LINK);
 }
 
 void NTPLoginHandler::UpdateLogin() {