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

chrome/browser/importer/profile_writer_unittest.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 "chrome/browser/importer/profile_writer.h"
 
 #include <string>
 
 #include "base/message_loop/message_loop.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 11 matching lines @@
 #include "content/public/test/test_browser_thread.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using bookmarks::BookmarkMatch;
 using content::BrowserThread;
 
 class TestProfileWriter : public ProfileWriter {
  public:
   explicit TestProfileWriter(Profile* profile) : ProfileWriter(profile) {}
  protected:
-  virtual ~TestProfileWriter() {}
+  ~TestProfileWriter() override {}
 };
 
 class ProfileWriterTest : public testing::Test {
  public:
   ProfileWriterTest()
       : ui_thread_(BrowserThread::UI, &loop_),
         file_thread_(BrowserThread::FILE, &loop_) {
   }
   virtual ~ProfileWriterTest() {}
 
@@ skipping 160 matching lines @@
       new TestProfileWriter(&profile));
   profile_writer->AddHistoryPage(pages_, history::SOURCE_FIREFOX_IMPORTED);
   VerifyHistoryCount(&profile);
   size_t original_history_count = history_count_;
   history_count_ = 0;
 
   profile_writer->AddHistoryPage(pages_, history::SOURCE_FIREFOX_IMPORTED);
   VerifyHistoryCount(&profile);
   EXPECT_EQ(original_history_count, history_count_);
 }