Remove dependency of PrefSyncableService on Profile.

chrome/browser/prefs/chrome_pref_model_associator_client.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 "chrome/browser/prefs/chrome_pref_model_associator_client.h"
+
+#include "base/lazy_instance.h"
+#include "chrome/common/pref_names.h"
+#include "components/content_settings/core/browser/website_settings_info.h"
+#include "components/content_settings/core/browser/website_settings_registry.h"
+
+namespace {
+
+base::LazyInstance<ChromePrefModelAssociatorClient>
+    g_chrome_pref_model_associatory_client;
+
+}  // namespace
+
+ChromePrefModelAssociatorClient::ChromePrefModelAssociatorClient() {
+  RegisterPreference(prefs::kURLsToRestoreOnStartup,
+                     PREF_MODEL_PREFERENCE_TYPE_LIST);
+
+  content_settings::WebsiteSettingsRegistry* registry =

[gab, 2015/09/10 14:15:09]

const& registry = *...GetInstance();

and then use it as a const& without needing to deref below?

+      content_settings::WebsiteSettingsRegistry::GetInstance();
+  for (const content_settings::WebsiteSettingsInfo* info : *registry) {
+    RegisterPreference(info->pref_name(), PREF_MODEL_PREFERENCE_TYPE_DICT);
+  }
+}
+
+ChromePrefModelAssociatorClient::~ChromePrefModelAssociatorClient() {}
+
+// static
+ChromePrefModelAssociatorClient*
+ChromePrefModelAssociatorClient::GetInstance() {
+  return g_chrome_pref_model_associatory_client.Pointer();
+}