Split TabRestoreService into InMemoryTRS and PersistentTRS

chrome/browser/ui/android/tab_restore_service_delegate_android.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.
 
+// Tabs persistence is implemented on the Java side.
+
 #include "chrome/browser/sessions/tab_restore_service_delegate.h"
 
 #include "content/public/browser/navigation_controller.h"
 
 // static
+TabRestoreServiceDelegate* TabRestoreServiceDelegate::Create(
+    Profile* profile,
+    const std::string& app_name) {
+  return NULL;
+}
+
+// static
 TabRestoreServiceDelegate*
     TabRestoreServiceDelegate::FindDelegateForWebContents(
         const content::WebContents* contents) {
-  // We don't restore tabs using TabRestoreService yet.
   return NULL;
 }
+
+// static
+TabRestoreServiceDelegate* TabRestoreServiceDelegate::FindDelegateWithID(
+    SessionID::id_type desired_id) {
+  return NULL;
+}