Return webcontents and add in test.

chrome/browser/sessions/persistent_tab_restore_service.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/sessions/persistent_tab_restore_service.h"
 
 #include <cstring>  // memcpy
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 924 matching lines @@
 }
 
 void PersistentTabRestoreService::ClearEntries() {
   helper_.ClearEntries();
 }
 
 const TabRestoreService::Entries& PersistentTabRestoreService::entries() const {
   return helper_.entries();
 }
 
-void PersistentTabRestoreService::RestoreMostRecentEntry(
-    TabRestoreServiceDelegate* delegate,
-    chrome::HostDesktopType host_desktop_type) {
-  helper_.RestoreMostRecentEntry(delegate, host_desktop_type);
+std::vector<content::WebContents*>
+    PersistentTabRestoreService::RestoreMostRecentEntry(

[sky, 2013/08/05 16:16:17]

nit: don't indent this 4. Either none or 2 (not sure which). The following two
lines should be 4 space indented. Same comment for 958-962.

[Kristen Dwan, 2013/08/05 18:01:38]

Done.

+        TabRestoreServiceDelegate* delegate,
+        chrome::HostDesktopType host_desktop_type) {
+  return helper_.RestoreMostRecentEntry(delegate, host_desktop_type);
 }
 
 TabRestoreService::Tab* PersistentTabRestoreService::RemoveTabEntryById(
     SessionID::id_type id) {
   return helper_.RemoveTabEntryById(id);
 }
 
-void PersistentTabRestoreService::RestoreEntryById(
-    TabRestoreServiceDelegate* delegate,
-    SessionID::id_type id,
-    chrome::HostDesktopType host_desktop_type,
-    WindowOpenDisposition disposition) {
-  helper_.RestoreEntryById(delegate, id, host_desktop_type, disposition);
+std::vector<content::WebContents*>
+    PersistentTabRestoreService::RestoreEntryById(
+      TabRestoreServiceDelegate* delegate,
+      SessionID::id_type id,
+      chrome::HostDesktopType host_desktop_type,
+      WindowOpenDisposition disposition) {
+  return helper_.RestoreEntryById(delegate, id, host_desktop_type, disposition);
 }
 
 bool PersistentTabRestoreService::IsLoaded() const {
   return delegate_->IsLoaded();
 }
 
 void PersistentTabRestoreService::DeleteLastSession() {
   return delegate_->DeleteLastSession();
 }
 
@@ skipping 10 matching lines @@
 }
 
 void PersistentTabRestoreService::PruneEntries() {
   helper_.PruneEntries();
 }
 
 BrowserContextKeyedService* TabRestoreServiceFactory::BuildServiceInstanceFor(
     content::BrowserContext* profile) const {
   return new PersistentTabRestoreService(static_cast<Profile*>(profile), NULL);
 }