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 4524ea65da2ff9c23f4a02dbb9a168c4bc75cd46..bf2fad34ef5e8bae093fa025ca5e63189cd16bd5 100644
--- a/chrome/browser/chromeos/login/login_performer.h
+++ b/chrome/browser/chromeos/login/login_performer.h
@@ -10,10 +10,10 @@
 
 #include "base/basictypes.h"
 #include "base/memory/ref_counted.h"
+#include "base/memory/weak_ptr.h"
 #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/common/notification_observer.h"
@@ -52,7 +52,6 @@ namespace chromeos {
 // 1. ScreenLock active (pending correct new password input)
 // 2. Pending online auth request.
 class LoginPerformer : public LoginStatusConsumer,
-                       public SignedSettingsHelper::Callback,
                        public NotificationObserver,
                        public ProfileManagerObserver {
  public:
@@ -128,10 +127,6 @@ class LoginPerformer : public LoginStatusConsumer,
                        const NotificationSource& source,
                        const 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;
 
@@ -212,7 +207,7 @@ class LoginPerformer : public LoginStatusConsumer,
   // True if we use OAuth during authorization process.
   bool using_oauth_;
 
-  ScopedRunnableMethodFactory<LoginPerformer> method_factory_;
+  base::WeakPtrFactory<LoginPerformer> pointer_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(LoginPerformer);
 };