Introduce TabRestoreServiceClient and //chrome implementation.

chrome/browser/ui/toolbar/recent_tabs_sub_menu_model_unittest.cc

Index: chrome/browser/ui/toolbar/recent_tabs_sub_menu_model_unittest.cc
diff --git a/chrome/browser/ui/toolbar/recent_tabs_sub_menu_model_unittest.cc b/chrome/browser/ui/toolbar/recent_tabs_sub_menu_model_unittest.cc
index 4da699236552b05c92335eb200307c43300c696d..e7eb80b2fc245475dbbdc0b76a0588001fae6430 100644
--- a/chrome/browser/ui/toolbar/recent_tabs_sub_menu_model_unittest.cc
+++ b/chrome/browser/ui/toolbar/recent_tabs_sub_menu_model_unittest.cc
@@ -11,6 +11,7 @@
 #include "base/memory/scoped_ptr.h"
 #include "base/run_loop.h"
 #include "chrome/app/chrome_command_ids.h"
+#include "chrome/browser/sessions/chrome_tab_restore_service_client.h"
 #include "chrome/browser/sessions/persistent_tab_restore_service.h"
 #include "chrome/browser/sessions/session_service.h"
 #include "chrome/browser/sessions/session_service_factory.h"
@@ -143,7 +144,10 @@ class RecentTabsSubMenuModelTest
   static scoped_ptr<KeyedService> GetTabRestoreService(
       content::BrowserContext* browser_context) {
     return make_scoped_ptr(new PersistentTabRestoreService(
-        Profile::FromBrowserContext(browser_context), NULL));
+        Profile::FromBrowserContext(browser_context),
+        make_scoped_ptr(new ChromeTabRestoreServiceClient(
+            Profile::FromBrowserContext(browser_context))),
+        nullptr));
   }
 
   sync_driver::OpenTabsUIDelegate* GetOpenTabsDelegate() {