Remove remaining HTML elements

sky/engine/core/html/HTMLIFrameElement.h

-// Copyright 2014 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.
-
-#ifndef SKY_ENGINE_CORE_HTML_HTMLIFRAMEELEMENT_H_
-#define SKY_ENGINE_CORE_HTML_HTMLIFRAMEELEMENT_H_
-
-#include "gen/sky/core/HTMLNames.h"
-#include "mojo/services/view_manager/public/cpp/view_observer.h"
-#include "sky/engine/core/dom/DOMURLUtils.h"
-#include "sky/engine/core/dom/Document.h"
-#include "sky/engine/core/html/HTMLElement.h"
-#include "sky/engine/wtf/OwnPtr.h"
-
-namespace blink {
-
-class RemoteFrame;
-
-class HTMLIFrameElement : public HTMLElement,
-                          public mojo::ViewObserver {
-    DEFINE_WRAPPERTYPEINFO();
-public:
-    static PassRefPtr<HTMLIFrameElement> create(Document&);
-
-    ~HTMLIFrameElement() override;
-
-    mojo::View* contentView() const { return m_contentView; }
-
-    PassRefPtr<DartValue> takeServicesHandle(DartState*);
-    PassRefPtr<DartValue> takeExposedServicesHandle(DartState*);
-    void embedViewManagerClient(RefPtr<DartValue> client);
-
-private:
-    explicit HTMLIFrameElement(Document&);
-
-    // HTMLElement methods:
-    RenderObject* createRenderer(RenderStyle* style) override;
-
-    void insertedInto(ContainerNode*) override;
-    void removedFrom(ContainerNode*) override;
-    void parseAttribute(const QualifiedName& name, const AtomicString& value) override;
-
-    // ViewObserver methods:
-    void OnViewDestroyed(mojo::View* view) override;
-
-    void createView();
-    void navigateView();
-
-    mojo::View* m_contentView;
-    mojo::ServiceProviderPtr m_services;
-    mojo::ScopedMessagePipeHandle m_exposedServices;
-};
-
-} // namespace blink
-
-#endif  // SKY_ENGINE_CORE_HTML_HTMLIFRAMEELEMENT_H_