Standardize usage of virtual/override/final specifiers.

chrome/browser/net/dns_probe_browsertest.cc

 // Copyright 2013 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 <set>
 
 #include "base/bind.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "base/path_service.h"
@@ skipping 411 matching lines @@
   int actual_delayed_probe_count =
       delaying_dns_probe_service_->delayed_probe_count();
   EXPECT_EQ(expected_delayed_probe_count, actual_delayed_probe_count);
 
   delaying_dns_probe_service_->StartDelayedProbes();
 }
 
 class DnsProbeBrowserTest : public InProcessBrowserTest {
  public:
   DnsProbeBrowserTest();
-  virtual ~DnsProbeBrowserTest();
+  ~DnsProbeBrowserTest() override;
 
   void SetUpOnMainThread() override;
   void TearDownOnMainThread() override;
 
  protected:
   // Sets the browser object that other methods apply to, and that has the
   // DnsProbeStatus messages of its currently active tab monitored.
   void SetActiveBrowser(Browser* browser);
 
   void SetCorrectionServiceBroken(bool broken);
@@ skipping 546 matching lines @@
 
   EXPECT_EQ(chrome_common_net::DNS_PROBE_FINISHED_INCONCLUSIVE,
             WaitForSentStatus());
   EXPECT_EQ(0, pending_status_count());
   ExpectDisplayingLocalErrorPage("ERR_NAME_NOT_RESOLVED");
 }
 
 }  // namespace
 
 }  // namespace chrome_browser_net