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

chrome/browser/managed_mode/managed_user_service.cc

 // Copyright (c) 2013 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/managed_mode/managed_user_service.h"
 
 #include "base/memory/ref_counted.h"
 #include "base/prefs/pref_service.h"
 #include "base/sequenced_task_runner.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/extensions/extension_system.h"
 #include "chrome/browser/managed_mode/managed_mode_site_list.h"
-#include "chrome/browser/prefs/pref_registry_syncable.h"
 #include "chrome/browser/prefs/scoped_user_pref_update.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/common/chrome_notification_types.h"
 #include "chrome/common/extensions/extension_set.h"
 #include "chrome/common/pref_names.h"
+#include "components/user_prefs/pref_registry_syncable.h"
 #include "content/public/browser/browser_thread.h"
 #include "grit/generated_resources.h"
 #include "ui/base/l10n/l10n_util.h"
 
 using content::BrowserThread;
 
 ManagedUserService::URLFilterContext::URLFilterContext()
     : ui_url_filter_(new ManagedModeURLFilter),
       io_url_filter_(new ManagedModeURLFilter) {}
 ManagedUserService::URLFilterContext::~URLFilterContext() {}
@@ skipping 362 matching lines @@
       profile_->GetPrefs()->GetDictionary(prefs::kManagedModeManualURLs);
   scoped_ptr<std::map<GURL, bool> > url_map(new std::map<GURL, bool>());
   for (DictionaryValue::Iterator it(*dict); !it.IsAtEnd(); it.Advance()) {
     bool allow = false;
     bool result = it.value().GetAsBoolean(&allow);
     DCHECK(result);
     (*url_map)[GURL(it.key())] = allow;
   }
   url_filter_context_.SetManualURLs(url_map.Pass());
 }