Split PrefService into PrefService, PrefServiceSimple and PrefServiceSyncable.

chrome/browser/prefs/chrome_pref_service_builder.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_builder.h"
-
-#include "base/bind.h"
-#include "base/file_path.h"
-#include "base/file_util.h"
-#include "base/metrics/histogram.h"
-#include "base/prefs/default_pref_store.h"
-#include "base/prefs/json_pref_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_notifier_impl.h"
-#include "chrome/browser/prefs/pref_service.h"
-#include "chrome/browser/prefs/pref_value_store.h"
-#include "chrome/browser/profiles/profile.h"
-#include "chrome/browser/ui/profile_error_dialog.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 {
-
-// Shows notifications which correspond to PersistentPrefStore's reading errors.
-void HandleReadError(PersistentPrefStore::PrefReadError error) {
-  if (error != PersistentPrefStore::PREF_READ_ERROR_NONE) {
-    // Failing to load prefs on startup is a bad thing(TM). See bug 38352 for
-    // an example problem that this can cause.
-    // Do some diagnosis and try to avoid losing data.
-    int message_id = 0;
-    if (error <= PersistentPrefStore::PREF_READ_ERROR_JSON_TYPE) {
-      message_id = IDS_PREFERENCES_CORRUPT_ERROR;
-    } else if (error != PersistentPrefStore::PREF_READ_ERROR_NO_FILE) {
-      message_id = IDS_PREFERENCES_UNREADABLE_ERROR;
-    }
-
-    if (message_id) {
-      BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
-                              base::Bind(&ShowProfileErrorDialog, message_id));
-    }
-    UMA_HISTOGRAM_ENUMERATION("PrefService.ReadError", error,
-                              PersistentPrefStore::PREF_READ_ERROR_MAX_ENUM);
-  }
-}
-
-}  // namespace
-
-// TODO(joi): Find a better home for this.
-PrefServiceBase* PrefServiceBase::FromBrowserContext(BrowserContext* context) {
-  return static_cast<Profile*>(context)->GetPrefs();
-}
-
-ChromePrefServiceBuilder::ChromePrefServiceBuilder() {
-  ResetDefaultState();
-}
-
-ChromePrefServiceBuilder::~ChromePrefServiceBuilder() {
-}
-
-PrefService* ChromePrefServiceBuilder::CreateChromePrefs(
-    const FilePath& pref_filename,
-    base::SequencedTaskRunner* pref_io_task_runner,
-    policy::PolicyService* policy_service,
-    PrefStore* extension_prefs,
-    bool async) {
-#if defined(OS_LINUX)
-  // We'd like to see what fraction of our users have the preferences
-  // stored on a network file system, as we've had no end of troubles
-  // with NFS/AFS.
-  // TODO(evanm): remove this once we've collected state.
-  file_util::FileSystemType fstype;
-  if (file_util::GetFileSystemType(pref_filename.DirName(), &fstype)) {
-    UMA_HISTOGRAM_ENUMERATION("PrefService.FileSystemType",
-                              static_cast<int>(fstype),
-                              file_util::FILE_SYSTEM_TYPE_COUNT);
-  }
-#endif
-
-#if defined(ENABLE_CONFIGURATION_POLICY)
-  using policy::ConfigurationPolicyPrefStore;
-  WithManagedPrefs(
-      ConfigurationPolicyPrefStore::CreateMandatoryPolicyPrefStore(
-          policy_service));
-  WithRecommendedPrefs(
-      ConfigurationPolicyPrefStore::CreateRecommendedPolicyPrefStore(
-          policy_service));
-#endif  // ENABLE_CONFIGURATION_POLICY
-
-  WithAsync(async);
-  WithExtensionPrefs(extension_prefs);
-  WithCommandLinePrefs(
-      new CommandLinePrefStore(CommandLine::ForCurrentProcess()));
-  WithUserPrefs(new JsonPrefStore(pref_filename, pref_io_task_runner));
-
-  PrefService* pref_service = Create();
-  ResetDefaultState();
-  return pref_service;
-}
-
-void ChromePrefServiceBuilder::ResetDefaultState() {
-  WithReadErrorCallback(base::Bind(&HandleReadError));
-  WithSyncAssociator(new PrefModelAssociator());
-}