Standardize usage of virtual/override/final specifiers.

content/browser/fileapi/local_file_stream_reader_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 "storage/browser/blob/local_file_stream_reader.h"
 
 #include <string>
 
 #include "base/files/file.h"
 #include "base/files/file_path.h"
@@ skipping 46 matching lines @@
   base::MessageLoop::current()->Quit();
 }
 
 }  // namespace
 
 class LocalFileStreamReaderTest : public testing::Test {
  public:
   LocalFileStreamReaderTest()
       : file_thread_("FileUtilProxyTestFileThread") {}
 
-  virtual void SetUp() override {
+  void SetUp() override {
     ASSERT_TRUE(file_thread_.Start());
     ASSERT_TRUE(dir_.CreateUniqueTempDir());
 
     base::WriteFile(test_path(), kTestData, kTestDataSize);
     base::File::Info info;
     ASSERT_TRUE(base::GetFileInfo(test_path(), &info));
     test_file_modification_time_ = info.last_modified;
   }
 
-  virtual void TearDown() override {
+  void TearDown() override {
     // Give another chance for deleted streams to perform Close.
     base::RunLoop().RunUntilIdle();
     file_thread_.Stop();
     base::RunLoop().RunUntilIdle();
   }
 
  protected:
   LocalFileStreamReader* CreateFileReader(
       const base::FilePath& path,
       int64 initial_offset,
@@ skipping 161 matching lines @@
   int rv = reader->Read(buf.get(), buf->size(), base::Bind(&NeverCalled));
   ASSERT_TRUE(rv == net::ERR_IO_PENDING || rv >= 0);
 
   // Delete immediately.
   // Should not crash; nor should NeverCalled be callback.
   reader.reset();
   EnsureFileTaskFinished();
 }
 
 }  // namespace content