Make TabRestoreService::Entry noncopyable and fix up surrounding code.

chrome/browser/sessions/persistent_tab_restore_service_browsertest.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.
 
 // TODO(jamescook): Why does this test run on all Aura platforms, instead of
 // only Chrome OS or Ash?
 #if defined(USE_AURA)
 
 #include "components/sessions/core/persistent_tab_restore_service.h"
 
@@ skipping 20 matching lines @@
   Browser* app_browser = CreateBrowserForApp(app_name, profile);
   app_browser->window()->Close();
   content::WindowedNotificationObserver observer(
       chrome::NOTIFICATION_BROWSER_CLOSED,
       content::Source<Browser>(app_browser));
   observer.Wait();
 
   // One entry should be created.
   ASSERT_EQ(1U, trs->entries().size());
   const sessions::TabRestoreService::Entry* restored_entry =
-      trs->entries().front();
+      trs->entries().front().get();
 
   // It should be a window with an app.
   ASSERT_EQ(sessions::TabRestoreService::WINDOW, restored_entry->type);
-  const Window* restored_window =
-      static_cast<const Window*>(restored_entry);
+  const Window* restored_window = static_cast<const Window*>(restored_entry);
   EXPECT_EQ(app_name, restored_window->app_name);
 }
 
 #endif  // defined(USE_AURA)