Revert of Delete base/prefs and update callers to use components.

ios/chrome/browser/browser_state/chrome_browser_state_io_data.cc

 // Copyright 2015 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 "ios/chrome/browser/browser_state/chrome_browser_state_io_data.h"
 
 #include <stddef.h>
 
 #include <string>
 #include <utility>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/callback.h"
 #include "base/command_line.h"
 #include "base/compiler_specific.h"
 #include "base/debug/alias.h"
 #include "base/logging.h"
 #include "base/macros.h"
 #include "base/path_service.h"
+#include "base/prefs/pref_service.h"
 #include "base/stl_util.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
 #include "base/thread_task_runner_handle.h"
 #include "base/threading/sequenced_worker_pool.h"
 #include "components/about_handler/about_protocol_handler.h"
 #include "components/content_settings/core/browser/content_settings_provider.h"
 #include "components/content_settings/core/browser/cookie_settings.h"
 #include "components/content_settings/core/browser/host_content_settings_map.h"
 #include "components/data_reduction_proxy/core/browser/data_reduction_proxy_io_data.h"
 #include "components/metrics/metrics_pref_names.h"
 #include "components/net_log/chrome_net_log.h"
-#include "components/prefs/pref_service.h"
 #include "components/signin/core/common/signin_pref_names.h"
 #include "components/sync_driver/pref_names.h"
 #include "ios/chrome/browser/application_context.h"
 #include "ios/chrome/browser/chrome_url_constants.h"
 #include "ios/chrome/browser/content_settings/cookie_settings_factory.h"
 #include "ios/chrome/browser/content_settings/host_content_settings_map_factory.h"
 #include "ios/chrome/browser/ios_chrome_io_thread.h"
 #include "ios/chrome/browser/net/ios_chrome_http_user_agent_settings.h"
 #include "ios/chrome/browser/net/ios_chrome_network_delegate.h"
 #include "ios/chrome/browser/net/ios_chrome_url_request_context_getter.h"
@@ skipping 439 matching lines @@
   return scoped_ptr<net::HttpCache>(
       new net::HttpCache(session, std::move(main_backend), true));
 }
 
 scoped_ptr<net::HttpCache> ChromeBrowserStateIOData::CreateHttpFactory(
     net::HttpNetworkSession* shared_session,
     scoped_ptr<net::HttpCache::BackendFactory> backend) const {
   return scoped_ptr<net::HttpCache>(
       new net::HttpCache(shared_session, std::move(backend), true));
 }