Standardize usage of virtual/override/final specifiers.

chrome/browser/copresence/chrome_whispernet_client_browsertest.cc

 // Copyright 2014 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/copresence/chrome_whispernet_client.h"
 
 #include <cstdlib>
 #include <string>
 
 #include "base/bind.h"
@@ skipping 34 matching lines @@
 
   return buffer;
 }
 
 }  // namespace
 
 class ChromeWhispernetClientTest : public ExtensionBrowserTest {
  public:
   ChromeWhispernetClientTest() : context_(NULL), initialized_(false) {}
 
-  virtual ~ChromeWhispernetClientTest() {}
+  ~ChromeWhispernetClientTest() override {}
 
   void InitializeWhispernet() {
     context_ = browser()->profile();
     run_loop_.reset(new base::RunLoop());
     GetWhispernetClient(context_)->Initialize(base::Bind(
         &ChromeWhispernetClientTest::InitCallback, base::Unretained(this)));
     run_loop_->Run();
 
     EXPECT_TRUE(initialized_);
   }
@@ skipping 122 matching lines @@
   EncodeTokenAndSaveSamples(false);
   DecodeSamplesAndVerifyToken(false);
   DetectBroadcast();
 }
 
 IN_PROC_BROWSER_TEST_F(ChromeWhispernetClientTest, Audible) {
   InitializeWhispernet();
   EncodeTokenAndSaveSamples(true);
   DecodeSamplesAndVerifyToken(true);
 }