Register preferences, which are needed for the invalidations

Bug: 895897, 801985
Change-Id: I3820e991ae28cefed045e143e2b199633d5d6514
Reviewed-on: https://chromium-review.googlesource.com/c/1328881Reviewed-by: David Roger <droger@chromium.org>
Commit-Queue: Tatiana Gornak <melandory@chromium.org>
Cr-Commit-Position: refs/heads/master@{#609247}

ios/chrome/browser/prefs/BUILD.gn

@@ -36,6 +36,7 @@ source_set("browser_prefs") {
     "//components/flags_ui",
     "//components/gcm_driver",
     "//components/handoff",
+    "//components/invalidation/impl:impl",
     "//components/language/core/browser",
     "//components/metrics",
     "//components/network_time",

ios/chrome/browser/prefs/browser_prefs.mm

@@ -11,6 +11,8 @@
 #include "components/flags_ui/pref_service_flags_storage.h"
 #include "components/gcm_driver/gcm_channel_status_syncer.h"
 #import "components/handoff/handoff_manager.h"
+#include "components/invalidation/impl/invalidator_registrar_with_memory.h"
+#include "components/invalidation/impl/per_user_topic_registration_manager.h"
 #include "components/language/core/browser/pref_names.h"
 #include "components/metrics/metrics_pref_names.h"
 #include "components/network_time/network_time_tracker.h"
@@ -121,6 +123,8 @@ void RegisterBrowserStatePrefs(user_prefs::PrefRegistrySyncable* registry) {
   RegisterVoiceSearchBrowserStatePrefs(registry);
   sync_sessions::SessionSyncPrefs::RegisterProfilePrefs(registry);
   syncer::SyncPrefs::RegisterProfilePrefs(registry);
+  syncer::PerUserTopicRegistrationManager::RegisterProfilePrefs(registry);
+  syncer::InvalidatorRegistrarWithMemory::RegisterProfilePrefs(registry);
   TemplateURLPrepopulateData::RegisterProfilePrefs(registry);
   translate::TranslatePrefs::RegisterProfilePrefs(registry);
   unified_consent::UnifiedConsentService::RegisterPrefs(registry);