Standardize usage of virtual/override/final specifiers.

extensions/renderer/api/serial/data_sender_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 <queue>
 
 #include "device/serial/data_sink_receiver.h"
 #include "device/serial/data_stream.mojom.h"
 #include "extensions/renderer/api_test_base.h"
 #include "grit/extensions_renderer_resources.h"
 
 namespace extensions {
 
 // Runs tests defined in extensions/test/data/data_sender_unittest.js
 class DataSenderTest : public ApiTestBase {
  public:
   DataSenderTest() {}
 
-  virtual void SetUp() override {
+  void SetUp() override {
     ApiTestBase::SetUp();
     env()->RegisterModule("async_waiter", IDR_ASYNC_WAITER_JS);
     env()->RegisterModule("data_sender", IDR_DATA_SENDER_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);
     service_provider()->AddService(
         base::Bind(&DataSenderTest::CreateDataSink, base::Unretained(this)));
   }
 
-  virtual void TearDown() override {
+  void TearDown() override {
     if (receiver_.get()) {
       receiver_->ShutDown();
       receiver_ = NULL;
     }
     EXPECT_FALSE(buffer_);
     buffer_.reset();
     ApiTestBase::TearDown();
   }
 
   std::queue<int32_t> error_to_report_;
@@ skipping 141 matching lines @@
 
 TEST_F(DataSenderTest, SerializeWaitsForCancel) {
   RunTest("data_sender_unittest.js", "testSerializeWaitsForCancel");
 }
 
 TEST_F(DataSenderTest, SerializeAfterClose) {
   RunTest("data_sender_unittest.js", "testSerializeAfterClose");
 }
 
 }  // namespace extensions