Standardize usage of virtual/override/final specifiers.

chrome/browser/download/download_request_limiter_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 "chrome/browser/download/download_request_limiter.h"
 
 #include "base/bind.h"
 #include "base/run_loop.h"
 #include "chrome/browser/download/download_request_infobar_delegate.h"
 #include "chrome/browser/infobars/infobar_service.h"
@@ skipping 42 matching lines @@
 };
 
 class DownloadRequestLimiterTest : public ChromeRenderViewHostTestHarness {
  public:
   enum TestingAction {
     ACCEPT,
     CANCEL,
     WAIT
   };
 
-  virtual void SetUp() {
+  void SetUp() override {
     ChromeRenderViewHostTestHarness::SetUp();
     InfoBarService::CreateForWebContents(web_contents());
 
     PermissionBubbleManager::CreateForWebContents(web_contents());
     view_.reset(new FakePermissionBubbleView(this));
     PermissionBubbleManager* manager =
       PermissionBubbleManager::FromWebContents(web_contents());
     manager->SetView(view_.get());
 
     testing_action_ = ACCEPT;
@@ skipping 25 matching lines @@
         host->Accept();
         break;
       case CANCEL:
         host->Cancel();
         break;
       case WAIT:
         break;
     }
   }
 
-  virtual void TearDown() {
+  void TearDown() override {
     content_settings_->ShutdownOnUIThread();
     content_settings_ = NULL;
     UnsetDelegate();
     ChromeRenderViewHostTestHarness::TearDown();
   }
 
   virtual void UnsetDelegate() {
     DownloadRequestInfoBarDelegate::SetCallbackForTesting(NULL);
   }
 
@@ skipping 331 matching lines @@
   CanDownload();
   ExpectAndResetCounts(0, 1, 0, __LINE__);
   ASSERT_EQ(DownloadRequestLimiter::PROMPT_BEFORE_DOWNLOAD,
             download_request_limiter_->GetDownloadStatus(web_contents()));
 
   CanDownload();
   ExpectAndResetCounts(0, 1, 0, __LINE__);
   ASSERT_EQ(DownloadRequestLimiter::PROMPT_BEFORE_DOWNLOAD,
             download_request_limiter_->GetDownloadStatus(web_contents()));
 }