PART1: Initiated the SignedSettings refactoring.

chrome/browser/chromeos/login/login_performer.h

Index: chrome/browser/chromeos/login/login_performer.h
diff --git a/chrome/browser/chromeos/login/login_performer.h b/chrome/browser/chromeos/login/login_performer.h
index d8eb8e3a69f6624702730a07f17e831054832d72..1372a10e7f3c339092bf9109a9e45b35ee877cb5 100644
--- a/chrome/browser/chromeos/login/login_performer.h
+++ b/chrome/browser/chromeos/login/login_performer.h
@@ -13,7 +13,6 @@
 #include "base/task.h"
 #include "chrome/browser/chromeos/login/authenticator.h"
 #include "chrome/browser/chromeos/login/login_status_consumer.h"
-#include "chrome/browser/chromeos/login/signed_settings_helper.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/common/net/gaia/google_service_auth_error.h"
 #include "content/public/browser/notification_observer.h"
@@ -52,7 +51,6 @@ namespace chromeos {
 // 1. ScreenLock active (pending correct new password input)
 // 2. Pending online auth request.
 class LoginPerformer : public LoginStatusConsumer,
-                       public SignedSettingsHelper::Callback,
                        public content::NotificationObserver,
                        public ProfileManagerObserver {
  public:
@@ -128,10 +126,6 @@ class LoginPerformer : public LoginStatusConsumer,
                        const content::NotificationSource& source,
                        const content::NotificationDetails& details) OVERRIDE;
 
-  // SignedSettingsHelper::Callback implementation:
-  virtual void OnCheckWhitelistCompleted(SignedSettings::ReturnCode code,
-                                         const std::string& email) OVERRIDE;
-
   // ProfileManagerObserver implementation:
   virtual void OnProfileCreated(Profile* profile, Status status) OVERRIDE;