Standardize usage of virtual/override/final specifiers.

chrome/browser/download/chrome_download_manager_delegate_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_path.h"
 #include "base/files/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/message_loop/message_loop.h"
 #include "base/prefs/pref_service.h"
 #include "base/run_loop.h"
@@ skipping 109 matching lines @@
           const base::FilePath&,
           const DownloadTargetDeterminerDelegate::FileSelectedCallback&));
 };
 
 class ChromeDownloadManagerDelegateTest
     : public ChromeRenderViewHostTestHarness {
  public:
   ChromeDownloadManagerDelegateTest();
 
   // ::testing::Test
-  virtual void SetUp() override;
-  virtual void TearDown() override;
+  void SetUp() override;
+  void TearDown() override;
 
   // Verifies and clears test expectations for |delegate_| and
   // |download_manager_|.
   void VerifyAndClearExpectations();
 
   // Creates MockDownloadItem and sets up default expectations.
   content::MockDownloadItem* CreateActiveDownloadItem(int32 id);
 
   // Given the relative path |path|, returns the full path under the temporary
   // downloads directory.
@@ skipping 250 matching lines @@
       CreateActiveDownloadItem(1));
   EXPECT_CALL(*download_item, GetTargetFilePath())
       .WillRepeatedly(ReturnRef(existing_path));
   EXPECT_TRUE(CheckForFileExistence(download_item.get()));
 
   download_item.reset(CreateActiveDownloadItem(1));
   EXPECT_CALL(*download_item, GetTargetFilePath())
       .WillRepeatedly(ReturnRef(non_existent_path));
   EXPECT_FALSE(CheckForFileExistence(download_item.get()));
 }