Persist sessionStorage on disk.

chrome/browser/profiles/profile_impl.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.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/compiler_specific.h"
 #include "base/environment.h"
@@ skipping 282 matching lines @@
     prefs_.reset(PrefService::CreatePrefService(
         GetPrefFilePath(),
         policy_service_.get(),
         new ExtensionPrefStore(
             ExtensionPrefValueMapFactory::GetForProfile(this), false),
         false));
     OnPrefsLoaded(true);
   } else {
     NOTREACHED();
   }
+
+  if (command_line->HasSwitch(switches::kEnableRestoreSessionState))
+    SetSaveSessionStorageOnDisk(true);
 }
 
 void ProfileImpl::DoFinalInit(bool is_new_profile) {
   PrefService* prefs = GetPrefs();
   pref_change_registrar_.Init(prefs);
   pref_change_registrar_.Add(prefs::kGoogleServicesUsername, this);
   pref_change_registrar_.Add(prefs::kDefaultZoomLevel, this);
   pref_change_registrar_.Add(prefs::kProfileAvatarIndex, this);
   pref_change_registrar_.Add(prefs::kProfileName, this);
 
@@ skipping 792 matching lines @@
   if (!path.empty())
     *cache_path = path;
   *max_size = is_media_context ? prefs_->GetInteger(prefs::kMediaCacheSize) :
                                  prefs_->GetInteger(prefs::kDiskCacheSize);
 }
 
 base::Callback<ChromeURLDataManagerBackend*(void)>
     ProfileImpl::GetChromeURLDataManagerBackendGetter() const {
   return io_data_.GetChromeURLDataManagerBackendGetter();
 }