Standardize usage of virtual/override/final in chrome/browser/

chrome/browser/content_settings/content_settings_pref_provider_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/content_settings/content_settings_pref_provider.h"
 
 #include "base/auto_reset.h"
 #include "base/command_line.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 24 matching lines @@
 using ::testing::_;
 using content::BrowserThread;
 
 namespace content_settings {
 
 class DeadlockCheckerThread : public base::PlatformThread::Delegate {
  public:
   explicit DeadlockCheckerThread(PrefProvider* provider)
       : provider_(provider) {}
 
-  virtual void ThreadMain() override {
+  void ThreadMain() override {
     bool got_lock = provider_->lock_.Try();
     EXPECT_TRUE(got_lock);
     if (got_lock)
       provider_->lock_.Release();
   }
  private:
   PrefProvider* provider_;
   DISALLOW_COPY_AND_ASSIGN(DeadlockCheckerThread);
 };
 
@@ skipping 414 matching lines @@
   base::Time second = pref_content_settings_provider.GetLastUsage(
       pattern, pattern, CONTENT_SETTINGS_TYPE_GEOLOCATION);
 
   base::TimeDelta delta = second - first;
   EXPECT_EQ(delta.InSeconds(), 10);
 
   pref_content_settings_provider.ShutdownOnUIThread();
 }
 
 }  // namespace content_settings