signin: pull basic SigninManager functionality into new SigninManagerBase class.

chrome/browser/signin/signin_tracker.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/signin/signin_tracker.h"
 
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/signin/signin_manager.h"
 #include "chrome/browser/signin/signin_manager_factory.h"
 #include "chrome/browser/signin/token_service.h"
@@ skipping 163 matching lines @@
   return (service->IsSyncEnabledAndLoggedIn() &&
           service->IsSyncTokenAvailable() &&
           service->GetAuthError().state() == GoogleServiceAuthError::NONE &&
           !service->HasUnrecoverableError());
 }
 
 // static
 SigninTracker::LoginState SigninTracker::GetSigninState(
     Profile* profile,
     GoogleServiceAuthError* error) {
-  SigninManager* signin = SigninManagerFactory::GetForProfile(profile);
+  SigninManagerBase* signin = SigninManagerFactory::GetForProfile(profile);
   if (signin->GetAuthenticatedUsername().empty()) {
     // User is signed out, trigger a signin failure.
     if (error)
       *error = GoogleServiceAuthError(GoogleServiceAuthError::REQUEST_CANCELED);
     return WAITING_FOR_GAIA_VALIDATION;
   }
 
   // Wait until all of our services are logged in. For now this just means sync.
   // Long term, we should separate out service auth failures from the signin
   // process, but for the current UI flow we'll validate service signin status
@@ skipping 17 matching lines @@
     if (error)
       *error = signin->signin_global_error()->GetLastAuthError();
     return WAITING_FOR_GAIA_VALIDATION;
   }
 
   if (!service || service->sync_initialized())
     return SIGNIN_COMPLETE;
 
   return SERVICES_INITIALIZING;
 }