Standardize usage of virtual/override/final in google_apis/

google_apis/gcm/engine/mcs_client_unittest.cc

 // Copyright 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 "google_apis/gcm/engine/mcs_client.h"
 
 #include "base/command_line.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
@@ skipping 56 matching lines @@
 class TestMCSClient : public MCSClient {
  public:
   TestMCSClient(base::Clock* clock,
                 ConnectionFactory* connection_factory,
                 GCMStore* gcm_store,
                 gcm::GCMStatsRecorder* recorder)
     : MCSClient("", clock, connection_factory, gcm_store, recorder),
       next_id_(0) {
   }
 
-  virtual std::string GetNextPersistentId() override {
+  std::string GetNextPersistentId() override {
     return base::UintToString(++next_id_);
   }
 
  private:
   uint32 next_id_;
 };
 
 class MCSClientTest : public testing::Test {
  public:
   MCSClientTest();
@@ skipping 773 matching lines @@
 
   LoginClient(std::vector<std::string>());
   GetFakeHandler()->ExpectOutgoingMessage(message);
   GetFakeHandler()->ExpectOutgoingMessage(message2);
   PumpLoop();
 }
 
 } // namespace
 
 }  // namespace gcm