Remove some PrefMembers from ProfileIOData that are no longer used.

chrome/browser/profiles/profile_impl_io_data.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/profiles/profile_impl_io_data.h"
 
 #include <memory>
 #include <set>
 #include <string>
 #include <utility>
@@ skipping 361 matching lines @@
 
 void ProfileImplIOData::Handle::LazyInitialize() const {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   if (initialized_)
     return;
 
   // Set initialized_ to true at the beginning in case any of the objects
   // below try to get the ResourceContext pointer.
   initialized_ = true;
   PrefService* pref_service = profile_->GetPrefs();
-  io_data_->session_startup_pref()->Init(
-      prefs::kRestoreOnStartup, pref_service);
-  io_data_->session_startup_pref()->MoveToThread(
-      BrowserThread::GetTaskRunnerForThread(BrowserThread::IO));
   io_data_->safe_browsing_enabled()->Init(prefs::kSafeBrowsingEnabled,
       pref_service);
   io_data_->safe_browsing_enabled()->MoveToThread(
       BrowserThread::GetTaskRunnerForThread(BrowserThread::IO));
   io_data_->InitializeOnUIThread(profile_);
 }
 
 std::unique_ptr<ProfileIOData::ChromeURLRequestContextGetterVector>
 ProfileImplIOData::Handle::GetAllContextGetters() {
   ChromeURLRequestContextGetterMap::iterator iter;
@@ skipping 419 matching lines @@
     const base::Closure& completion) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
   DCHECK(initialized());
 
   DCHECK(transport_security_state());
   // Completes synchronously.
   transport_security_state()->DeleteAllDynamicDataSince(time);
   DCHECK(http_server_properties_manager_);
   http_server_properties_manager_->Clear(completion);
 }