Standardize usage of virtual/override/final specifiers.

chrome/browser/prerender/prerender_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 <map>
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/format_macros.h"
 #include "base/memory/scoped_vector.h"
@@ skipping 310 matching lines @@
                     prerender_link_manager_(
                         new PrerenderLinkManager(prerender_manager_.get())),
                     last_prerender_id_(0),
                     field_trial_list_(NULL) {
     // Enable omnibox prerendering.
     CommandLine::ForCurrentProcess()->AppendSwitchASCII(
         switches::kPrerenderFromOmnibox,
         switches::kPrerenderFromOmniboxSwitchValueEnabled);
   }
 
-  virtual ~PrerenderTest() {
+  ~PrerenderTest() override {
     prerender_link_manager_->OnChannelClosing(kDefaultChildId);
     prerender_link_manager_->Shutdown();
     prerender_manager_->Shutdown();
   }
 
   UnitTestPrerenderManager* prerender_manager() {
     return prerender_manager_.get();
   }
 
   PrerenderLinkManager* prerender_link_manager() {
@@ skipping 1231 matching lines @@
   CHECK(prerender_handle.get());
   EXPECT_TRUE(prerender_handle->IsPrerendering());
   EXPECT_TRUE(prerender_contents->prerendering_has_started());
   EXPECT_EQ(prerender_contents, prerender_handle->contents());
   EXPECT_EQ(ORIGIN_INSTANT, prerender_handle->contents()->origin());
   ASSERT_EQ(prerender_contents, prerender_manager()->FindAndUseEntry(url));
   EXPECT_FALSE(prerender_handle->IsPrerendering());
 }
 
 }  // namespace prerender