Remove some dead code about "acknowledged types"

chrome/browser/sync/profile_sync_service.cc

 // Copyright (c) 2012 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/sync/profile_sync_service.h"
 
 #include <cstddef>
 #include <map>
 #include <vector>
 
@@ skipping 1796 matching lines @@
     NOTREACHED();
     return;
   }
 
   UpdateSelectedTypesHistogram(sync_everything, chosen_types);
   sync_prefs_.SetKeepEverythingSynced(sync_everything);
 
   if (directory_data_type_manager_.get())
     directory_data_type_manager_->ResetDataTypeErrors();
   ChangePreferredDataTypes(chosen_types);
-  AcknowledgeSyncedTypes();
 }
 
 void ProfileSyncService::ChangePreferredDataTypes(
     syncer::ModelTypeSet preferred_types) {
 
   DVLOG(1) << "ChangePreferredDataTypes invoked";
   const syncer::ModelTypeSet registered_types = GetRegisteredDataTypes();
   const syncer::ModelTypeSet registered_preferred_types =
       Intersection(registered_types, preferred_types);
   sync_prefs_.SetPreferredDataTypes(registered_types,
@@ skipping 669 matching lines @@
   return signin_->GetOriginal();
 }
 
 void ProfileSyncService::UnsuppressAndStart() {
   DCHECK(profile_);
   sync_prefs_.SetStartSuppressed(false);
   DCHECK(!signin_.get() || signin_->GetOriginal()->IsAuthenticated());
   startup_controller_->TryStart();
 }
 
-void ProfileSyncService::AcknowledgeSyncedTypes() {
-  sync_prefs_.AcknowledgeSyncedTypes(GetRegisteredDataTypes());
-}
-
 void ProfileSyncService::ReconfigureDatatypeManager() {
   // If we haven't initialized yet, don't configure the DTM as it could cause
   // association to start before a Directory has even been created.
   if (backend_initialized_) {
     DCHECK(backend_.get());
     ConfigureDataTypeManager();
   } else if (HasUnrecoverableError()) {
     // There is nothing more to configure. So inform the listeners,
     NotifyObservers();
 
@@ skipping 251 matching lines @@
   std::string birthday;
   syncer::UserShare* user_share = GetUserShare();
   if (user_share && user_share->directory.get()) {
     birthday = user_share->directory->store_birthday();
   }
   if (!access_token_.empty() && !cache_guid.empty() && !birthday.empty()) {
     sync_stopped_reporter_->ReportSyncStopped(
         access_token_, cache_guid, birthday);
   }
 }