Standardize usage of virtual/override/final specifiers.

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 107 matching lines @@
       observer_(new StrictMock<MockDownloadDestinationObserver>),
       observer_factory_(observer_.get()),
       input_stream_(NULL),
       bytes_(-1),
       bytes_per_sec_(-1),
       hash_state_("xyzzy"),
       ui_thread_(BrowserThread::UI, &loop_),
       file_thread_(BrowserThread::FILE, &loop_) {
   }
 
-  virtual ~DownloadFileTest() {
-  }
+  ~DownloadFileTest() override {}
 
   void SetUpdateDownloadInfo(int64 bytes, int64 bytes_per_sec,
                              const std::string& hash_state) {
     bytes_ = bytes;
     bytes_per_sec_ = bytes_per_sec;
     hash_state_ = hash_state;
   }
 
   void ConfirmUpdateDownloadInfo() {
     observer_->CurrentUpdateStatus(bytes_, bytes_per_sec_, hash_state_);
   }
 
-  virtual void SetUp() {
+  void SetUp() override {
     EXPECT_CALL(*(observer_.get()), DestinationUpdate(_, _, _))
         .Times(AnyNumber())
         .WillRepeatedly(Invoke(this, &DownloadFileTest::SetUpdateDownloadInfo));
   }
 
   // Mock calls to this function are forwarded here.
   void RegisterCallback(const base::Closure& sink_callback) {
     sink_callback_ = sink_callback;
   }
 
@@ skipping 630 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