Move the bits of Prefs where production code has only trivially easy

chrome/browser/signin/signin_manager.h

 // 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.
 //
 // The signin manager encapsulates some functionality tracking
 // which user is signed in. When a user is signed in, a ClientLogin
 // request is run on their behalf. Auth tokens are fetched from Google
 // and the results are stored in the TokenService.
 //
 // **NOTE** on semantics of SigninManager:
 //
 // Once a signin is successful, the username becomes "established" and will not
 // be cleared until a SignOut operation is performed (persists across
 // restarts). Until that happens, the signin manager can still be used to
 // refresh credentials, but changing the username is not permitted.
 
 #ifndef CHROME_BROWSER_SIGNIN_SIGNIN_MANAGER_H_
 #define CHROME_BROWSER_SIGNIN_SIGNIN_MANAGER_H_
 
 #include <string>
 
 #include "base/compiler_specific.h"
 #include "base/gtest_prod_util.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
-#include "chrome/browser/api/prefs/pref_change_registrar.h"
+#include "base/prefs/public/pref_change_registrar.h"
 #include "chrome/browser/profiles/profile_keyed_service.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "google_apis/gaia/gaia_auth_consumer.h"
 #include "google_apis/gaia/google_service_auth_error.h"
 
 class GaiaAuthFetcher;
 class Profile;
 class PrefService;
 
@@ skipping 167 matching lines @@
 
   // The type of sign being performed.  This value is valid only between a call
   // to one of the StartSigninXXX methods and when the sign in is either
   // successful or not.
   SigninType type_;
 
   DISALLOW_COPY_AND_ASSIGN(SigninManager);
 };
 
 #endif  // CHROME_BROWSER_SIGNIN_SIGNIN_MANAGER_H_