PART1: Initiated the SignedSettings refactoring.

chrome/browser/chromeos/login/google_authenticator.cc

Index: chrome/browser/chromeos/login/google_authenticator.cc
diff --git a/chrome/browser/chromeos/login/google_authenticator.cc b/chrome/browser/chromeos/login/google_authenticator.cc
index a0877b457994713c9dfe03210e0c8bf0d666e46d..419d05f104860162321a3edb5304f1d5cd0d0aaa 100644
--- a/chrome/browser/chromeos/login/google_authenticator.cc
+++ b/chrome/browser/chromeos/login/google_authenticator.cc
@@ -117,7 +117,7 @@ void GoogleAuthenticator::ClearClientLoginAttempt() {
   login_token_.clear();
   login_captcha_.clear();
 }
-bool GoogleAuthenticator::CompleteLogin(Profile* profile,
+void GoogleAuthenticator::CompleteLogin(Profile* profile,
                                         const std::string& username,
                                         const std::string& password) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
@@ -130,10 +130,9 @@ bool GoogleAuthenticator::CompleteLogin(Profile* profile,
       NewRunnableMethod(this,
                         &GoogleAuthenticator::OnLoginSuccess,
                         GaiaAuthConsumer::ClientLoginResult(), false));
-  return true;
 }
 
-bool GoogleAuthenticator::AuthenticateToLogin(
+void GoogleAuthenticator::AuthenticateToLogin(
     Profile* profile,
     const std::string& username,
     const std::string& password,
@@ -154,7 +153,6 @@ bool GoogleAuthenticator::AuthenticateToLogin(
   // Will be used for retries.
   PrepareClientLoginAttempt(password, login_token, login_captcha);
   TryClientLogin();
-  return true;
 }
 
 bool GoogleAuthenticator::AuthenticateToUnlock(const std::string& username,