Standardize usage of virtual/override/final specifiers.

components/gcm_driver/gcm_channel_status_request_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/message_loop/message_loop.h"
 #include "components/gcm_driver/gcm_channel_status_request.h"
 #include "net/url_request/test_url_fetcher_factory.h"
 #include "net/url_request/url_request_test_util.h"
 #include "sync/protocol/experiment_status.pb.h"
 #include "sync/protocol/experiments_specifics.pb.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace gcm {
 
 class GCMChannelStatusRequestTest : public testing::Test {
  public:
   GCMChannelStatusRequestTest();
-  virtual ~GCMChannelStatusRequestTest();
+  ~GCMChannelStatusRequestTest() override;
 
  protected:
   enum GCMStatus {
     NOT_SPECIFIED,
     GCM_ENABLED,
     GCM_DISABLED,
   };
 
   void StartRequest();
   void SetResponseStatusAndString(net::HttpStatusCode status_code,
@@ skipping 201 matching lines @@
   SetResponseProtoData(GCM_DISABLED, poll_interval_seconds);
   CompleteFetch();
 
   EXPECT_TRUE(request_callback_invoked_);
   EXPECT_TRUE(update_received_);
   EXPECT_FALSE(enabled_);
   EXPECT_EQ(poll_interval_seconds, poll_interval_seconds_);
 }
 
 }  // namespace gcm