Standardize usage of virtual/override/final specifiers in base/.

base/files/file_proxy_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/files/file_proxy.h"
 
 #include "base/bind.h"
 #include "base/files/file.h"
 #include "base/files/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/memory/weak_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "base/threading/thread.h"
 #include "base/threading/thread_restrictions.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace base {
 
 class FileProxyTest : public testing::Test {
  public:
   FileProxyTest()
       : file_thread_("FileProxyTestFileThread"),
         error_(File::FILE_OK),
         bytes_written_(-1),
         weak_factory_(this) {}
 
-  virtual void SetUp() override {
+  void SetUp() override {
     ASSERT_TRUE(dir_.CreateUniqueTempDir());
     ASSERT_TRUE(file_thread_.Start());
   }
 
   void DidFinish(File::Error error) {
     error_ = error;
     MessageLoop::current()->QuitWhenIdle();
   }
 
   void DidCreateOrOpen(File::Error error) {
@@ skipping 323 matching lines @@
   char buffer[53];
   EXPECT_EQ(53, base::ReadFile(test_path(), buffer, 53));
   int i = 0;
   for (; i < 10; ++i)
     EXPECT_EQ(kTestData[i], buffer[i]);
   for (; i < 53; ++i)
     EXPECT_EQ(0, buffer[i]);
 }
 
 }  // namespace base