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 821 matching lines @@
   // last_session_exited_cleanly_ is set when the preferences are loaded. Force
   // it to be set by asking for the prefs.
   GetPrefs();
   return last_session_exited_cleanly_;
 }
 
 quota::SpecialStoragePolicy* ProfileImpl::GetSpecialStoragePolicy() {
   return GetExtensionSpecialStoragePolicy();
 }
 
+bool ProfileImpl::ShouldSaveSessionStorageOnDisk() {
+  return CommandLine::ForCurrentProcess()->HasSwitch(
+      switches::kEnableRestoreSessionState);
+}
+
 BookmarkModel* ProfileImpl::GetBookmarkModel() {
   if (!bookmark_bar_model_.get()) {
     bookmark_bar_model_.reset(new BookmarkModel(this));
     bookmark_bar_model_->Load();
   }
   return bookmark_bar_model_.get();
 }
 
 ProtocolHandlerRegistry* ProfileImpl::GetProtocolHandlerRegistry() {
   return protocol_handler_registry_.get();
@@ skipping 295 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();
 }