Move remaining non-test, non-Chrome-specific Prefs code to base/prefs/.

chrome/browser/signin/about_signin_internals.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/about_signin_internals.h"
 
 #include "base/debug/trace_event.h"
 #include "base/hash.h"
 #include "base/i18n/time_formatting.h"
 #include "base/logging.h"
+#include "base/prefs/pref_service.h"
 #include "base/utf_string_conversions.h"
-#include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/signin/signin_internals_util.h"
 #include "chrome/browser/signin/signin_manager.h"
 #include "chrome/browser/signin/token_service.h"
 #include "chrome/browser/signin/token_service_factory.h"
 #include "chrome/browser/ui/webui/signin_internals_ui.h"
 #include "google_apis/gaia/gaia_constants.h"
 
 using namespace signin_internals_util;
 
@@ skipping 189 matching lines @@
 
 void AboutSigninInternals::NotifyObservers() {
   FOR_EACH_OBSERVER(AboutSigninInternals::Observer,
                     signin_observers_,
                     OnSigninStateChanged(signin_status_.ToValue()));
 }
 
 scoped_ptr<DictionaryValue> AboutSigninInternals::GetSigninStatus() {
   return signin_status_.ToValue().Pass();
 }