Decouple iOS port from ChromeMetricsServiceClient

ios/chrome/browser/prefs/browser_prefs.mm

 // 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/prefs/browser_prefs.h"
 
 #include "base/prefs/pref_service.h"
 #include "components/autofill/core/browser/autofill_manager.h"
 #include "components/content_settings/core/browser/host_content_settings_map.h"
 #include "components/data_reduction_proxy/core/browser/data_reduction_proxy_prefs.h"
@@ skipping 11 matching lines @@
 #include "components/sync_driver/sync_prefs.h"
 #include "components/translate/core/browser/translate_prefs.h"
 #include "components/translate/core/common/translate_pref_names.h"
 #include "components/variations/service/variations_service.h"
 #include "components/web_resource/promo_resource_service.h"
 #include "ios/chrome/browser/application_context_impl.h"
 #include "ios/chrome/browser/browser_state/browser_state_info_cache.h"
 #include "ios/chrome/browser/first_run/first_run.h"
 #import "ios/chrome/browser/geolocation/omnibox_geolocation_local_state.h"
 #import "ios/chrome/browser/memory/memory_debugger_manager.h"
+#import "ios/chrome/browser/metrics/ios_chrome_metrics_service_client.h"
 #include "ios/chrome/browser/net/http_server_properties_manager_factory.h"
 #include "ios/chrome/browser/pref_names.h"
 #include "ios/chrome/browser/signin/signin_manager_factory.h"
 #include "ios/chrome/grit/ios_locale_settings.h"
 #include "ios/public/provider/chrome/browser/chrome_browser_provider.h"
 #include "ui/base/l10n/l10n_util.h"
 
 namespace {
 
 // TODO(crbug.com/525079): those preferences are not used on iOS but are
 // required to be able to run unit_tests until componentization of
 // chrome/browser/prefs is complete.
 const char kURLsToRestoreOnStartup[] = "session.startup_urls";
 const char kURLsToRestoreOnStartupOld[] = "session.urls_to_restore_on_startup";
 
 }  // namespace
 
 void RegisterLocalStatePrefs(PrefRegistrySimple* registry) {
   BrowserStateInfoCache::RegisterPrefs(registry);
   gcm::GCMChannelStatusSyncer::RegisterPrefs(registry);
   ios::SigninManagerFactory::RegisterPrefs(registry);
+  IOSChromeMetricsServiceClient::RegisterPrefs(registry);
   network_time::NetworkTimeTracker::RegisterPrefs(registry);
   PrefProxyConfigTrackerImpl::RegisterPrefs(registry);
   rappor::RapporService::RegisterPrefs(registry);
   variations::VariationsService::RegisterPrefs(registry);
   web_resource::PromoResourceService::RegisterPrefs(registry);
 
   // Preferences related to the browser state manager.
   registry->RegisterStringPref(ios::prefs::kBrowserStateLastUsed,
                                std::string());
   registry->RegisterIntegerPref(ios::prefs::kBrowserStatesNumCreated, 1);
@@ skipping 75 matching lines @@
 
 // This method should be periodically pruned of year+ old migrations.
 void MigrateObsoleteBrowserStatePrefs(PrefService* prefs) {
   // Added 07/2014.
   translate::TranslatePrefs::MigrateUserPrefs(prefs,
                                               ios::prefs::kAcceptLanguages);
 
   // Added 08/2015.
   prefs->ClearPref(::prefs::kSigninSharedAuthenticationUserId);
 }