Standardize usage of virtual/override/final specifiers in google_apis/.

google_apis/gcm/engine/gservices_settings_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 "base/strings/string_number_conversions.h"
 #include "google_apis/gcm/engine/gservices_settings.h"
 #include "google_apis/gcm/engine/registration_info.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace gcm {
@@ skipping 28 matching lines @@
     setting->set_value(iter->second);
   }
   checkin_response.set_settings_diff(settings_diff);
 }
 
 }  // namespace
 
 class GServicesSettingsTest : public testing::Test {
  public:
   GServicesSettingsTest();
-  virtual ~GServicesSettingsTest();
+  ~GServicesSettingsTest() override;
 
   void CheckAllSetToDefault();
 
   GServicesSettings& settings() {
     return gservices_settings_;
   }
 
  private:
   GServicesSettings gservices_settings_;
 };
@@ skipping 267 matching lines @@
   checkin_response.Clear();
   AddSettingsToResponse(checkin_response, settings_diff, true);
   EXPECT_TRUE(settings().UpdateFromCheckinResponse(checkin_response));
   EXPECT_EQ(full_settings, settings().settings_map());
   // Default setting back to norm.
   EXPECT_EQ(GURL("https://mtalk.google.com:5228"),
             settings().GetMCSMainEndpoint());
 }
 
 }  // namespace gcm