Standardize usage of virtual/override/final specifiers.

chrome/browser/download/download_status_updater_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/memory/scoped_vector.h"
 #include "base/memory/weak_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "base/stl_util.h"
 #include "chrome/browser/download/download_status_updater.h"
 #include "content/public/test/mock_download_item.h"
@@ skipping 32 matching lines @@
   size_t notification_count_;
   content::DownloadItem* acceptable_notification_item_;
 };
 
 class DownloadStatusUpdaterTest : public testing::Test {
  public:
   DownloadStatusUpdaterTest()
       : updater_(new TestDownloadStatusUpdater()),
         ui_thread_(content::BrowserThread::UI, &loop_) {}
 
-  virtual ~DownloadStatusUpdaterTest() {
+  ~DownloadStatusUpdaterTest() override {
     for (size_t mgr_idx = 0; mgr_idx < managers_.size(); ++mgr_idx) {
       EXPECT_CALL(*Manager(mgr_idx), RemoveObserver(_));
     }
 
     delete updater_;
     updater_ = NULL;
     VerifyAndClearExpectations();
 
     managers_.clear();
     for (std::vector<Items>::iterator it = manager_items_.begin();
@@ skipping 269 matching lines @@
   SetItemValues(0, 0, 10, 20, false);
   SetItemValues(0, 1, 50, 60, false);
   SetItemValues(1, 0, 80, 90, false);
 
   float progress = -1;
   int download_count = -1;
   EXPECT_TRUE(updater_->GetProgress(&progress, &download_count));
   EXPECT_FLOAT_EQ((10+50+80)/(20.0f+60+90), progress);
   EXPECT_EQ(3, download_count);
 }