Introduce //components/user_prefs, use to eliminate c/b/prefs dependency in Autofill.

chrome/browser/ui/browser_ui_prefs.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/ui/browser_ui_prefs.h"
 
 #include "base/prefs/pref_registry_simple.h"
 #include "base/prefs/pref_service.h"
 #include "chrome/browser/first_run/first_run.h"
-#include "chrome/browser/prefs/pref_registry_syncable.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/common/pref_names.h"
+#include "components/user_prefs/pref_registry_syncable.h"
 
 namespace chrome {
 
 void RegisterBrowserPrefs(PrefRegistrySimple* registry) {
   registry->RegisterIntegerPref(prefs::kOptionsWindowLastTabIndex, 0);
   registry->RegisterBooleanPref(prefs::kAllowFileSelectionDialogs, true);
   registry->RegisterIntegerPref(prefs::kShowFirstRunBubbleOption,
                              first_run::FIRST_RUN_BUBBLE_DONT_SHOW);
 }
 
@@ skipping 151 matching lines @@
     // TODO(joi): Do all registration up front.
     scoped_refptr<PrefRegistrySyncable> registry(
         static_cast<PrefRegistrySyncable*>(prefs->DeprecatedGetPrefRegistry()));
     registry->RegisterDictionaryPref(window_pref.c_str(),
                                      PrefRegistrySyncable::UNSYNCABLE_PREF);
   }
 }
 
 
 }  // namespace chrome