Standardize usage of virtual/override/final specifiers.

extensions/renderer/api/serial/serial_api_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 "device/serial/serial_device_enumerator.h"
 #include "device/serial/serial_service_impl.h"
 #include "device/serial/test_serial_io_handler.h"
 #include "extensions/renderer/api_test_base.h"
 #include "grit/extensions_renderer_resources.h"
 
@@ skipping 376 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(BlockSendsForeverSendIoHandler);
 };
 
 }  // namespace
 
 class SerialApiTest : public ApiTestBase {
  public:
   SerialApiTest() {}
 
-  virtual void SetUp() override {
+  void SetUp() override {
     ApiTestBase::SetUp();
     env()->RegisterModule("async_waiter", IDR_ASYNC_WAITER_JS);
     env()->RegisterModule("data_receiver", IDR_DATA_RECEIVER_JS);
     env()->RegisterModule("data_sender", IDR_DATA_SENDER_JS);
     env()->RegisterModule("serial", IDR_SERIAL_CUSTOM_BINDINGS_JS);
     env()->RegisterModule("serial_service", IDR_SERIAL_SERVICE_JS);
     env()->RegisterModule("device/serial/data_stream.mojom",
                           IDR_DATA_STREAM_MOJOM_JS);
     env()->RegisterModule("device/serial/data_stream_serialization.mojom",
                           IDR_DATA_STREAM_SERIALIZATION_MOJOM_JS);
@@ skipping 226 matching lines @@
 
 TEST_F(SerialApiTest, SetPausedUnknownConnectionId) {
   RunTest("serial_unittest.js", "testSetPausedUnknownConnectionId");
 }
 
 TEST_F(SerialApiTest, SendUnknownConnectionId) {
   RunTest("serial_unittest.js", "testSendUnknownConnectionId");
 }
 
 }  // namespace extensions