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

components/invalidation/invalidation_service_android_unittest.cc

 // Copyright (c) 2013 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 "components/invalidation/invalidation_service_android.h"
 
 #include "base/android/jni_android.h"
 #include "components/invalidation/fake_invalidation_handler.h"
 #include "components/invalidation/invalidation_service_test_template.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace invalidation {
 
 #if defined(OS_ANDROID)
 
 class InvalidationServiceAndroidTest : public testing::Test {
  public:
   InvalidationServiceAndroidTest() :
       invalidation_service_(base::android::GetApplicationContext()) {}
-  virtual ~InvalidationServiceAndroidTest() {}
+  ~InvalidationServiceAndroidTest() override {}
 
   InvalidationService& invalidation_service() {
     return invalidation_service_;
   }
 
  private:
   InvalidationServiceAndroid invalidation_service_;
 };
 
 TEST_F(InvalidationServiceAndroidTest, FetchClientId) {
   const std::string id1 = invalidation_service().GetInvalidatorClientId();
   ASSERT_FALSE(id1.empty());
 
   // If nothing else, the ID should be consistent.
   const std::string id2 = invalidation_service().GetInvalidatorClientId();
   ASSERT_EQ(id1, id2);
 }
 
 #endif
 
 }  // namespace invalidation