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

chrome/browser/pepper_flash_settings_manager.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/pepper_flash_settings_manager.h"
 
 #include <map>
 #include <utility>
 #include <vector>
 
 #include "base/bind.h"
 #include "base/compiler_specific.h"
 #include "base/prefs/pref_service.h"
 #include "base/sequenced_task_runner_helpers.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/plugins/plugin_prefs.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"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/pepper_flash_settings_helper.h"
 #include "content/public/browser/plugin_service.h"
 #include "content/public/common/content_constants.h"
 #include "googleurl/src/gurl.h"
 #include "ipc/ipc_channel.h"
 #include "ipc/ipc_listener.h"
 #include "ppapi/proxy/ppapi_messages.h"
 #include "webkit/plugins/plugin_constants.h"
@@ skipping 984 matching lines @@
 }
 
 void PepperFlashSettingsManager::OnError(Core* core) {
   DCHECK(core);
   if (core != core_.get())
     return;
 
   core_->Detach();
   core_ = NULL;
 }