PART1: Initiated the SignedSettings refactoring.

chrome/browser/chromeos/login/authenticator.h

Index: chrome/browser/chromeos/login/authenticator.h
diff --git a/chrome/browser/chromeos/login/authenticator.h b/chrome/browser/chromeos/login/authenticator.h
index 7e404405a886e21b779c79e42c44900c9f0b33a5..6df0d9e11a4cc91ff2cdce617f05bbbd6e7ce018 100644
--- a/chrome/browser/chromeos/login/authenticator.h
+++ b/chrome/browser/chromeos/login/authenticator.h
@@ -31,17 +31,15 @@ class Authenticator : public base::RefCountedThreadSafe<Authenticator> {
 
   // Given externally authenticated |username| and |password|, this method
   // attempts to complete authentication process.
-  // Returns true if the attempt gets sent successfully and false if not.
-  virtual bool CompleteLogin(Profile* profile,
+  virtual void CompleteLogin(Profile* profile,
                              const std::string& username,
                              const std::string& password) = 0;
 
   // Given a |username| and |password|, this method attempts to authenticate
   // to login.
   // Optionally |login_token| and |login_captcha| could be provided.
-  // Returns true if we kick off the attempt successfully and false if we can't.
   // Must be called on the UI thread.
-  virtual bool AuthenticateToLogin(Profile* profile,
+  virtual void AuthenticateToLogin(Profile* profile,
                                    const std::string& username,
                                    const std::string& password,
                                    const std::string& login_token,