PART1: Initiated the SignedSettings refactoring.

chrome/browser/chromeos/login/google_authenticator.h

Index: chrome/browser/chromeos/login/google_authenticator.h
diff --git a/chrome/browser/chromeos/login/google_authenticator.h b/chrome/browser/chromeos/login/google_authenticator.h
index 6d38e113ba0deb39b9f825b4043951910f6bf459..cf0f6ef234a6f0b56cf83d875086f11721de74e4 100644
--- a/chrome/browser/chromeos/login/google_authenticator.h
+++ b/chrome/browser/chromeos/login/google_authenticator.h
@@ -47,7 +47,7 @@ class GoogleAuthenticator : public Authenticator, public GaiaAuthConsumer {
   // of authentication cookies or a callback to consumer_->OnLoginFailure() with
   // an error message.
   // 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) OVERRIDE;
 
@@ -64,7 +64,7 @@ class GoogleAuthenticator : public Authenticator, public GaiaAuthConsumer {
   // call OnLoginFailure() with HOSTED_NOT_ALLOWED.
   //
   // Returns true if the attempt gets sent successfully and false if not.
-  virtual bool AuthenticateToLogin(Profile* profile,
+  virtual void AuthenticateToLogin(Profile* profile,
                                    const std::string& username,
                                    const std::string& password,
                                    const std::string& login_token,