Convert RLZ to a buildflag header

ios/chrome/browser/search_engines/template_url_service_factory.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/search_engines/template_url_service_factory.h"
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/memory/ptr_util.h"
 #include "base/memory/singleton.h"
 #include "components/keyed_service/core/service_access_type.h"
 #include "components/keyed_service/ios/browser_state_dependency_manager.h"
 #include "components/search_engines/default_search_manager.h"
 #include "components/search_engines/template_url_service.h"
 #include "ios/chrome/browser/application_context.h"
 #include "ios/chrome/browser/browser_state/browser_state_otr_helper.h"
 #include "ios/chrome/browser/browser_state/chrome_browser_state.h"
 #include "ios/chrome/browser/google/google_url_tracker_factory.h"
 #include "ios/chrome/browser/history/history_service_factory.h"
 #include "ios/chrome/browser/search_engines/template_url_service_client_impl.h"
 #include "ios/chrome/browser/search_engines/ui_thread_search_terms_data.h"
 #include "ios/chrome/browser/web_data_service_factory.h"
+#include "rlz/features/features.h"
 
-#if defined(ENABLE_RLZ)
+#if BUILDFLAG(ENABLE_RLZ)
 #include "components/rlz/rlz_tracker.h"  // nogncheck
 #endif
 
 namespace ios {
 namespace {
 
 base::Closure GetDefaultSearchProviderChangedCallback() {
-#if defined(ENABLE_RLZ)
+#if BUILDFLAG(ENABLE_RLZ)
   return base::Bind(base::IgnoreResult(&rlz::RLZTracker::RecordProductEvent),
                     rlz_lib::CHROME, rlz::RLZTracker::ChromeOmnibox(),
                     rlz_lib::SET_TO_GOOGLE);
 #else
   return base::Closure();
 #endif
 }
 
 std::unique_ptr<KeyedService> BuildTemplateURLService(
     web::BrowserState* context) {
@@ skipping 58 matching lines @@
 web::BrowserState* TemplateURLServiceFactory::GetBrowserStateToUse(
     web::BrowserState* context) const {
   return GetBrowserStateRedirectedInIncognito(context);
 }
 
 bool TemplateURLServiceFactory::ServiceIsNULLWhileTesting() const {
   return true;
 }
 
 }  // namespace ios