Fix virtual/override/final usage in the rest of Source/core/.

Source/core/inspector/DevToolsHost.cpp

 /*
  * Copyright (C) 2007, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Matt Lilek <webkit@mattlilek.com>
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 45 matching lines @@
 
 namespace blink {
 
 class FrontendMenuProvider final : public ContextMenuProvider {
 public:
     static PassRefPtrWillBeRawPtr<FrontendMenuProvider> create(DevToolsHost* devtoolsHost, ScriptValue devtoolsApiObject, const Vector<ContextMenuItem>& items)
     {
         return adoptRefWillBeNoop(new FrontendMenuProvider(devtoolsHost, devtoolsApiObject, items));
     }
 
-    virtual ~FrontendMenuProvider()
+    ~FrontendMenuProvider() override
     {
         // Verify that this menu provider has been detached.
         ASSERT(!m_devtoolsHost);
     }
 
     DEFINE_INLINE_VIRTUAL_TRACE()
     {
         visitor->trace(m_devtoolsHost);
         ContextMenuProvider::trace(visitor);
     }
 
     void disconnect()
     {
         m_devtoolsApiObject = ScriptValue();
         m_devtoolsHost = nullptr;
     }
 
-    virtual void contextMenuCleared() override
+    void contextMenuCleared() override
     {
         if (m_devtoolsHost) {
             ScriptFunctionCall function(m_devtoolsApiObject, "contextMenuCleared");
             function.call();
 
             m_devtoolsHost->clearMenuProvider();
             m_devtoolsHost = nullptr;
         }
         m_items.clear();
     }
 
-    virtual void populateContextMenu(ContextMenu* menu) override
+    void populateContextMenu(ContextMenu* menu) override
     {
         for (size_t i = 0; i < m_items.size(); ++i)
             menu->appendItem(m_items[i]);
     }
 
-    virtual void contextMenuItemSelected(const ContextMenuItem* item) override
+    void contextMenuItemSelected(const ContextMenuItem* item) override
     {
         if (!m_devtoolsHost)
             return;
 
         UserGestureIndicator gestureIndicator(DefinitelyProcessingNewUserGesture);
         int itemNumber = item->action() - ContextMenuItemBaseCustomTag;
 
         ScriptFunctionCall function(m_devtoolsApiObject, "contextMenuItemSelected");
         function.appendArgument(itemNumber);
         function.call();
@@ skipping 144 matching lines @@
 {
     return m_client && m_client->isUnderTest();
 }
 
 bool DevToolsHost::isHostedMode()
 {
     return false;
 }
 
 } // namespace blink