Convert RLZ to a buildflag header

ios/chrome/browser/ios_chrome_main_parts.mm

 // Copyright 2016 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/ios_chrome_main_parts.h"
 
 #include "base/base_switches.h"
 #include "base/feature_list.h"
 #include "base/files/file_path.h"
 #include "base/logging.h"
@@ skipping 34 matching lines @@
 #include "ios/chrome/browser/metrics/field_trial_synchronizer.h"
 #include "ios/chrome/browser/open_from_clipboard/create_clipboard_recent_content.h"
 #include "ios/chrome/browser/pref_names.h"
 #include "ios/chrome/browser/translate/translate_service_ios.h"
 #include "ios/public/provider/chrome/browser/chrome_browser_provider.h"
 #include "ios/web/public/web_thread.h"
 #include "net/base/network_change_notifier.h"
 #include "net/http/http_network_layer.h"
 #include "net/http/http_stream_factory.h"
 #include "net/url_request/url_request.h"
+#include "rlz/features/features.h"
 #include "ui/base/l10n/l10n_util_mac.h"
 #include "ui/base/resource/resource_bundle.h"
 
-#if defined(ENABLE_RLZ)
+#if BUILDFLAG(ENABLE_RLZ)
 #include "components/rlz/rlz_tracker.h"                        // nogncheck
 #include "ios/chrome/browser/rlz/rlz_tracker_delegate_impl.h"  // nogncheck
 #endif
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
 #error "This file requires ARC support."
 #endif
 
 IOSChromeMainParts::IOSChromeMainParts(
     const base::CommandLine& parsed_command_line)
@@ skipping 96 matching lines @@
       CreateClipboardRecentContentIOS().release());
 
   // Ensure that the browser state is initialized.
   EnsureBrowserStateKeyedServiceFactoriesBuilt();
   ios::GetChromeBrowserProvider()->AssertBrowserContextKeyedFactoriesBuilt();
   ios::ChromeBrowserStateManager* browser_state_manager =
       application_context_->GetChromeBrowserStateManager();
   ios::ChromeBrowserState* last_used_browser_state =
       browser_state_manager->GetLastUsedBrowserState();
 
-#if defined(ENABLE_RLZ)
+#if BUILDFLAG(ENABLE_RLZ)
   // Init the RLZ library. This just schedules a task on the file thread to be
   // run sometime later. If this is the first run we record the installation
   // event.
   int ping_delay = last_used_browser_state->GetPrefs()->GetInteger(
       FirstRun::GetPingDelayPrefName());
   // Negative ping delay means to send ping immediately after a first search is
   // recorded.
   rlz::RLZTracker::SetRlzDelegate(base::WrapUnique(new RLZTrackerDelegateImpl));
   rlz::RLZTracker::InitRlzDelayed(
       FirstRun::IsChromeFirstRun(), ping_delay < 0,
       base::TimeDelta::FromMilliseconds(abs(ping_delay)),
       RLZTrackerDelegateImpl::IsGoogleDefaultSearch(last_used_browser_state),
       RLZTrackerDelegateImpl::IsGoogleHomepage(last_used_browser_state),
       RLZTrackerDelegateImpl::IsGoogleInStartpages(last_used_browser_state));
-#endif  // defined(ENABLE_RLZ)
+#endif  // BUILDFLAG(ENABLE_RLZ)
 
   TranslateServiceIOS::Initialize();
   language_usage_metrics::LanguageUsageMetrics::RecordAcceptLanguages(
       last_used_browser_state->GetPrefs()->GetString(prefs::kAcceptLanguages));
   language_usage_metrics::LanguageUsageMetrics::RecordApplicationLanguage(
       application_context_->GetApplicationLocale());
 
   // Request new variations seed information from server.
   variations::VariationsService* variations_service =
       application_context_->GetVariationsService();
@@ skipping 100 matching lines @@
 
 void IOSChromeMainParts::StartMetricsRecording() {
   bool wifiOnly = local_state_->GetBoolean(prefs::kMetricsReportingWifiOnly);
   bool isConnectionCellular = net::NetworkChangeNotifier::IsConnectionCellular(
       net::NetworkChangeNotifier::GetConnectionType());
   bool mayUpload = !wifiOnly || !isConnectionCellular;
 
   application_context_->GetMetricsServicesManager()->UpdateUploadPermissions(
       mayUpload);
 }