Update {virtual,override} to follow C++11 style in chrome.

chrome/browser/sync/sync_error_notifier_ash_unittest.cc

 // Copyright 2014 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/sync/sync_error_notifier_ash.h"
 
 #include "ash/test/ash_test_base.h"
 #include "base/memory/scoped_ptr.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/notifications/notification.h"
@@ skipping 30 matching lines @@
 static const char kTestAccountId[] = "testuser@test.com";
 
 // Notification ID corresponding to kProfileSyncNotificationId + kTestAccountId.
 static const std::string kNotificationId =
     "chrome://settings/sync/testuser@test.com";
 
 #if defined(OS_WIN)
 class ScreenTypeDelegateDesktop : public gfx::ScreenTypeDelegate {
  public:
   ScreenTypeDelegateDesktop() {}
-  virtual ~ScreenTypeDelegateDesktop() {}
-  virtual gfx::ScreenType GetScreenTypeForNativeView(
-      gfx::NativeView view) override {
+  ~ScreenTypeDelegateDesktop() override {}
+  gfx::ScreenType GetScreenTypeForNativeView(gfx::NativeView view) override {
     return chrome::IsNativeViewInAsh(view) ?
         gfx::SCREEN_TYPE_ALTERNATE :
         gfx::SCREEN_TYPE_NATIVE;
   }
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ScreenTypeDelegateDesktop);
 };
 #endif
 
@@ skipping 168 matching lines @@
     SCOPED_TRACE("Not expecting notification since sync setup is incomplete");
     VerifySyncErrorNotifierResult(
         GoogleServiceAuthError::INVALID_GAIA_CREDENTIALS,
         false /* not signed in */,
         false /* no error */);
   }
 }
 
 }  // namespace test
 }  // namespace ash