[sessions] Properly namespace recently-componentized TabRestore code

chrome/browser/ui/toolbar/recent_tabs_sub_menu_model_unittest.cc

 // Copyright 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/ui/toolbar/recent_tabs_sub_menu_model.h"
 
 #include <string>
 #include <vector>
 
 #include "base/command_line.h"
@@ skipping 126 matching lines @@
         scoped_ptr<syncer::SyncErrorFactory>(
             new syncer::SyncErrorFactoryMock));
   }
 
   void WaitForLoadFromLastSession() {
     content::RunAllBlockingPoolTasksUntilIdle();
   }
 
   static scoped_ptr<KeyedService> GetTabRestoreService(
       content::BrowserContext* browser_context) {
-    return make_scoped_ptr(new PersistentTabRestoreService(
+    return make_scoped_ptr(new sessions::PersistentTabRestoreService(
         make_scoped_ptr(new ChromeTabRestoreServiceClient(
             Profile::FromBrowserContext(browser_context))),
         nullptr));
   }
 
   sync_driver::OpenTabsUIDelegate* GetOpenTabsDelegate() {
     return manager_.get();
   }
 
   void RegisterRecentTabs(RecentTabsBuilderTestHelper* helper) {
@@ skipping 436 matching lines @@
   // 2           Recently closed heaer (disabled)
   // 3           <separator>
   // 4           No tabs from other Devices
 
   TestRecentTabsSubMenuModel model(NULL, browser(), NULL);
   EXPECT_EQ(5, model.GetItemCount());
   EXPECT_EQ(-1, model.GetMaxWidthForItemAtIndex(2));
   EXPECT_NE(-1, model.GetMaxWidthForItemAtIndex(3));
   EXPECT_EQ(-1, model.GetMaxWidthForItemAtIndex(4));
 }