Standardize usage of virtual/override/final specifiers.

chrome/renderer/translate/translate_helper_browsertest.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 "base/time/time.h"
 #include "chrome/renderer/isolated_world_ids.h"
 #include "chrome/test/base/chrome_render_view_test.h"
 #include "components/translate/content/common/translate_messages.h"
 #include "components/translate/content/renderer/translate_helper.h"
 #include "components/translate/core/common/translate_constants.h"
@@ skipping 43 matching lines @@
 
  private:
   DISALLOW_COPY_AND_ASSIGN(TestTranslateHelper);
 };
 
 class TranslateHelperBrowserTest : public ChromeRenderViewTest {
  public:
   TranslateHelperBrowserTest() : translate_helper_(NULL) {}
 
  protected:
-  virtual void SetUp() override {
+  void SetUp() override {
     ChromeRenderViewTest::SetUp();
     translate_helper_ = new TestTranslateHelper(view_);
   }
 
-  virtual void TearDown() override {
+  void TearDown() override {
     delete translate_helper_;
     ChromeRenderViewTest::TearDown();
   }
 
   bool GetPageTranslatedMessage(std::string* original_lang,
                                 std::string* target_lang,
                                 translate::TranslateErrors::Type* error) {
     const IPC::Message* message = render_thread_->sink().
         GetUniqueMessageMatching(ChromeViewHostMsg_PageTranslated::ID);
     if (!message)
@@ skipping 374 matching lines @@
 
   GoBack(back_state);
 
   message = render_thread_->sink().GetUniqueMessageMatching(
       ChromeViewHostMsg_TranslateLanguageDetermined::ID);
   ASSERT_NE(static_cast<IPC::Message*>(NULL), message);
   ChromeViewHostMsg_TranslateLanguageDetermined::Read(message, &params);
   EXPECT_EQ("zh", params.a.adopted_language);
   render_thread_->sink().ClearMessages();
 }