Move prefs-related files under chrome/browser/ into a prefs/ subdir.

chrome/browser/dom_ui/shown_sections_handler.cc

 // Copyright (c) 2010 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/dom_ui/shown_sections_handler.h"
 
 #include "base/callback.h"
 #include "base/command_line.h"
 #include "base/string_number_conversions.h"
 #include "base/values.h"
 #include "chrome/browser/metrics/user_metrics.h"
-#include "chrome/browser/pref_service.h"
+#include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/profile.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/extensions/extension.h"
 #include "chrome/common/notification_details.h"
 #include "chrome/common/notification_type.h"
 #include "chrome/common/pref_names.h"
 
 namespace {
 
 // Will cause an UMA notification if the mode of the new tab page
@@ skipping 86 matching lines @@
   if (old_pref_version < 2) {
     // LIST is no longer used. Change to THUMB.
     shown_sections &= ~LIST;
     shown_sections |= THUMB;
     changed = true;
   }
 
   if (changed)
     pref_service->SetInteger(prefs::kNTPShownSections, shown_sections);
 }