Standardize usage of virtual/override/final specifiers.

components/gcm_driver/gcm_stats_recorder_impl_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_stats_recorder_impl.h"
 
 #include <deque>
 #include <string>
 #include <vector>
 
@@ skipping 82 matching lines @@
 static const char kNotifySendStatusEvent[] = "SEND status: QUEUED";
 static const char kNotifySendStatusDetails[] = "Msg size: 99 bytes, TTL: 7";
 static const char kIncomingSendErrorEvent[] = "Received 'send error' msg";
 static const char kIncomingSendErrorDetails[] = "";
 
 }  // namespace
 
 class GCMStatsRecorderImplTest : public testing::Test {
  public:
   GCMStatsRecorderImplTest();
-  virtual ~GCMStatsRecorderImplTest();
-  virtual void SetUp() override;
+  ~GCMStatsRecorderImplTest() override;
+  void SetUp() override;
 
   void VerifyRecordedCheckinCount(int expected_count) {
     EXPECT_EQ(expected_count,
               static_cast<int>(recorder_.checkin_activities().size()));
   }
   void VerifyRecordedConnectionCount(int expected_count) {
     EXPECT_EQ(expected_count,
               static_cast<int>(recorder_.connection_activities().size()));
   }
   void VerifyRecordedRegistrationCount(int expected_count) {
@@ skipping 401 matching lines @@
   recorder_.RecordIncomingSendError(kAppId, kReceiverId, kMessageId);
   VerifyRecordedSendingCount(3);
   VerifyIncomingSendError("3rd call");
 
   recorder_.RecordDataSentToWire(kAppId, kReceiverId, kMessageId, kQueuedSec);
   VerifyRecordedSendingCount(4);
   VerifyDataSentToWire("4th call");
 }
 
 }  // namespace gcm