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

chrome/browser/prefs/chrome_pref_service_factory.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/prefs/chrome_pref_service_factory.h"
 
 #include "base/bind.h"
 #include "base/file_util.h"
 #include "base/files/file_path.h"
 #include "base/metrics/histogram.h"
 #include "base/prefs/default_pref_store.h"
 #include "base/prefs/json_pref_store.h"
 #include "base/prefs/pref_notifier_impl.h"
 #include "base/prefs/pref_registry.h"
 #include "base/prefs/pref_service.h"
 #include "base/prefs/pref_value_store.h"
 #include "chrome/browser/policy/configuration_policy_pref_store.h"
 #include "chrome/browser/prefs/command_line_pref_store.h"
 #include "chrome/browser/prefs/pref_model_associator.h"
-#include "chrome/browser/prefs/pref_registry_syncable.h"
 #include "chrome/browser/prefs/pref_service_syncable_builder.h"
-#include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/profile_error_dialog.h"
+#include "components/user_prefs/pref_registry_syncable.h"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/browser_thread.h"
 #include "grit/chromium_strings.h"
 #include "grit/generated_resources.h"
 
 using content::BrowserContext;
 using content::BrowserThread;
 
 namespace {
 
@@ skipping 52 matching lines @@
   builder->WithAsync(async);
   builder->WithExtensionPrefs(extension_prefs);
   builder->WithCommandLinePrefs(
       new CommandLinePrefStore(CommandLine::ForCurrentProcess()));
   builder->WithReadErrorCallback(base::Bind(&HandleReadError));
   builder->WithUserPrefs(new JsonPrefStore(pref_filename, pref_io_task_runner));
 }
 
 }  // namespace
 
-// TODO(joi): Find a better home for this.
-PrefService* PrefServiceFromBrowserContext(BrowserContext* context) {
-  return static_cast<Profile*>(context)->GetPrefs();
-}
-
 namespace chrome_prefs {
 
 PrefService* CreateLocalState(
     const base::FilePath& pref_filename,
     base::SequencedTaskRunner* pref_io_task_runner,
     policy::PolicyService* policy_service,
     const scoped_refptr<PrefStore>& extension_prefs,
     const scoped_refptr<PrefRegistry>& pref_registry,
     bool async) {
   PrefServiceSyncableBuilder builder;
@@ skipping 17 matching lines @@
   PrepareBuilder(&builder,
                  pref_filename,
                  pref_io_task_runner,
                  policy_service,
                  extension_prefs,
                  async);
   return builder.CreateSyncable(pref_registry);
 }
 
 }  // namespace chrome_prefs