Standardize usage of virtual/override/final in components/

components/gcm_driver/gcm_driver_desktop_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 "components/gcm_driver/gcm_driver_desktop.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/location.h"
@@ skipping 28 matching lines @@
 
 const char kTestAccountID1[] = "user1@example.com";
 const char kTestAccountID2[] = "user2@example.com";
 const char kTestAppID1[] = "TestApp1";
 const char kTestAppID2[] = "TestApp2";
 const char kUserID1[] = "user1";
 
 class FakeGCMConnectionObserver : public GCMConnectionObserver {
  public:
   FakeGCMConnectionObserver();
-  virtual ~FakeGCMConnectionObserver();
+  ~FakeGCMConnectionObserver() override;
 
   // gcm::GCMConnectionObserver implementation:
-  virtual void OnConnected(const net::IPEndPoint& ip_endpoint) override;
-  virtual void OnDisconnected() override;
+  void OnConnected(const net::IPEndPoint& ip_endpoint) override;
+  void OnDisconnected() override;
 
   bool connected() const { return connected_; }
 
  private:
   bool connected_;
 };
 
 FakeGCMConnectionObserver::FakeGCMConnectionObserver() : connected_(false) {
 }
 
@@ skipping 1174 matching lines @@
   // After start-up, the request should still be scheduled at the expected
   // updated interval.
   actual_delay_seconds =
       syncer()->current_request_delay_interval().InSeconds();
   EXPECT_TRUE(CompareDelaySeconds(expected_delay_seconds, actual_delay_seconds))
       << "expected delay: " << expected_delay_seconds
       << " actual delay: " << actual_delay_seconds;
 }
 
 }  // namespace gcm