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 115 matching lines @@
 void SigninTracker::OnStateChanged() {
   HandleServiceStateChange();
 }
 
 void SigninTracker::HandleServiceStateChange() {
   if (state_ != SERVICES_INITIALIZING) {
     // Ignore service updates until after our GAIA credentials are validated.
     return;
   }
 
-  SigninManager* signin = SigninManagerFactory::GetForProfile(profile_);
+  SigninManagerBase* signin = SigninManagerFactory::GetForProfile(profile_);
   if (signin->GetAuthenticatedUsername().empty()) {
     // User is signed out, trigger a signin failure.
     state_ = WAITING_FOR_GAIA_VALIDATION;
     observer_->SigninFailed(
         GoogleServiceAuthError(GoogleServiceAuthError::REQUEST_CANCELED));
     return;
   }
 
   // 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
@@ skipping 43 matching lines @@
   // Don't care about the sync state if sync is disabled by policy.
   if (!profile->IsSyncAccessible())
     return true;
   ProfileSyncService* service =
       ProfileSyncServiceFactory::GetForProfile(profile);
   return (service->IsSyncEnabledAndLoggedIn() &&
           service->IsSyncTokenAvailable() &&
           service->GetAuthError().state() == GoogleServiceAuthError::NONE &&
           !service->HasUnrecoverableError());
 }