Abstract content::SessionStorageNamespace from core TabRestore code

chrome/browser/sessions/chrome_tab_restore_service_client.cc

 // Copyright 2015 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/sessions/chrome_tab_restore_service_client.h"
 
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/sessions/session_service.h"
 #include "chrome/browser/sessions/session_service_factory.h"
 #include "chrome/common/url_constants.h"
+#include "components/sessions/content/content_tab_client_data.h"
 #include "content/public/browser/browser_thread.h"
 
 #if defined(ENABLE_EXTENSIONS)
 #include "chrome/browser/extensions/tab_helper.h"
 #include "chrome/common/extensions/extension_constants.h"
 #include "chrome/common/extensions/extension_metrics.h"
 #include "extensions/browser/extension_registry.h"
 #include "extensions/common/extension.h"
 #include "extensions/common/extension_set.h"
 #endif
@@ skipping 82 matching lines @@
     const extensions::Extension* extension =
         extensions_tab_helper->extension_app();
     if (extension)
       extension_app_id = extension->id();
   }
 #endif
 
   return extension_app_id;
 }
 
+scoped_ptr<sessions::TabClientData>
+ChromeTabRestoreServiceClient::GetTabClientDataForWebContents(
+    content::WebContents* web_contents) {
+  return make_scoped_ptr(new sessions::ContentTabClientData(web_contents));
+}
+
 base::SequencedWorkerPool* ChromeTabRestoreServiceClient::GetBlockingPool() {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
   return content::BrowserThread::GetBlockingPool();
 }
 
 base::FilePath ChromeTabRestoreServiceClient::GetPathToSaveTo() {
   return profile_->GetPath();
 }
 
 GURL ChromeTabRestoreServiceClient::GetNewTabURL() {
@@ skipping 23 matching lines @@
   DCHECK(HasLastSession());
 #if defined(ENABLE_SESSION_SERVICE)
   SessionServiceFactory::GetForProfile(profile_)
       ->GetLastSession(callback, tracker);
 #endif
 }
 
 void ChromeTabRestoreServiceClient::OnTabRestored(const GURL& url) {
   RecordAppLaunch(profile_, url);
 }