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

content/browser/web_contents/web_contents_user_data_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 "content/public/browser/web_contents_user_data.h"
 
 #include "base/memory/scoped_ptr.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/test/test_renderer_host.h"
 #include "content/public/test/web_contents_tester.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace content {
 
 class WebContentsAttachedClass1
     : public WebContentsUserData<WebContentsAttachedClass1> {
  public:
-  virtual ~WebContentsAttachedClass1() {}
+  ~WebContentsAttachedClass1() override {}
+
  private:
   explicit WebContentsAttachedClass1(WebContents* contents) {}
   friend class WebContentsUserData<WebContentsAttachedClass1>;
 };
 
 class WebContentsAttachedClass2
     : public WebContentsUserData<WebContentsAttachedClass2> {
  public:
-  virtual ~WebContentsAttachedClass2() {}
+  ~WebContentsAttachedClass2() override {}
+
  private:
   explicit WebContentsAttachedClass2(WebContents* contents) {}
   friend class WebContentsUserData<WebContentsAttachedClass2>;
 };
 
 DEFINE_WEB_CONTENTS_USER_DATA_KEY(WebContentsAttachedClass1);
 DEFINE_WEB_CONTENTS_USER_DATA_KEY(WebContentsAttachedClass2);
 
 typedef RenderViewHostTestHarness WebContentsUserDataTest;
 
@@ skipping 61 matching lines @@
   ASSERT_TRUE(clazz != NULL);
 
   WebContentsAttachedClass1::CreateForWebContents(contents);
   WebContentsAttachedClass1* class_again =
       WebContentsAttachedClass1::FromWebContents(contents);
   ASSERT_TRUE(class_again != NULL);
   ASSERT_EQ(clazz, class_again);
 }
 
 }  // namespace content