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

chrome/browser/profiles/profile_metrics.h

Index: chrome/browser/profiles/profile_metrics.h
diff --git a/chrome/browser/profiles/profile_metrics.h b/chrome/browser/profiles/profile_metrics.h
index 1361dcdf1c3e8d66fce6a831dafe2fae0a259f4c..3ed932508ef1a22299b786090e82804017fdd417 100644
--- a/chrome/browser/profiles/profile_metrics.h
+++ b/chrome/browser/profiles/profile_metrics.h
@@ -10,6 +10,7 @@
 
 #include "base/basictypes.h"
 #include "chrome/browser/signin/signin_header_helper.h"
+#include "chrome/browser/signin/signin_promo.h"
 
 class Profile;
 class ProfileManager;
@@ -229,6 +230,9 @@ class ProfileMetrics {
   static void LogProfileLaunch(Profile* profile);
   static void LogProfileSyncSignIn(const base::FilePath& profile_path);
   static void LogProfileUpdate(const base::FilePath& profile_path);
+
+  // Logs the original source that showed the signin page.
+  static void LogSigninSource(signin::Source source);
 };