Standardize usage of virtual/override/final in content/browser/

content/browser/download/download_file_unittest.cc

 // Copyright (c) 2012 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.h"
 #include "base/files/file_util.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/test/test_file_util.h"
@@ skipping 69 matching lines @@
       : DownloadFileImpl(save_info.Pass(),
                          default_downloads_directory,
                          url,
                          referrer_url,
                          calculate_hash,
                          stream.Pass(),
                          bound_net_log,
                          observer) {}
 
  protected:
-  virtual base::TimeDelta GetRetryDelayForFailedRename(
-      int attempt_count) override {
+  base::TimeDelta GetRetryDelayForFailedRename(int attempt_count) override {
     return base::TimeDelta::FromMilliseconds(0);
   }
 
 #if !defined(OS_WIN)
   // On Posix, we don't encounter transient errors during renames, except
   // possibly EAGAIN, which is difficult to replicate reliably. So we resort to
   // simulating a transient error using ACCESS_DENIED instead.
-  virtual bool ShouldRetryFailedRename(
-      DownloadInterruptReason reason) override {
+  bool ShouldRetryFailedRename(DownloadInterruptReason reason) override {
     return reason == DOWNLOAD_INTERRUPT_REASON_FILE_ACCESS_DENIED;
   }
 #endif
 };
 
 }  // namespace
 
 class DownloadFileTest : public testing::Test {
  public:
 
@@ skipping 674 matching lines @@
 
   EXPECT_EQ(static_cast<int64>(strlen(kTestData1) + strlen(kTestData2)),
             bytes_);
   EXPECT_EQ(download_file_->GetHashState(), hash_state_);
 
   FinishStream(DOWNLOAD_INTERRUPT_REASON_NONE, true);
   DestroyDownloadFile(0);
 }
 
 }  // namespace content