Add LayoutRoot

sky/engine/core/painting/LayoutRoot.h

Index: sky/engine/core/painting/LayoutRoot.h
diff --git a/sky/engine/core/painting/LayoutRoot.h b/sky/engine/core/painting/LayoutRoot.h
new file mode 100644
index 0000000000000000000000000000000000000000..50a78b7f8b6ed564880e2ad874612e22b6a55d77
--- /dev/null
+++ b/sky/engine/core/painting/LayoutRoot.h
@@ -0,0 +1,62 @@
+// Copyright 2015 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_PAINTING_LAYOUTROOT_H_
+#define SKY_ENGINE_CORE_PAINTING_LAYOUTROOT_H_
+
+#include "sky/engine/core/dom/Node.h"
+#include "sky/engine/core/frame/FrameHost.h"
+#include "sky/engine/core/painting/Paint.h"
+#include "sky/engine/core/painting/Picture.h"
+#include "sky/engine/platform/graphics/DisplayList.h"
+#include "sky/engine/tonic/dart_wrappable.h"
+#include "sky/engine/wtf/PassRefPtr.h"
+#include "sky/engine/wtf/RefCounted.h"
+
+namespace blink {
+class Element;
+class Document;
+class LocalFrame;
+
+class LayoutRoot : public RefCounted<LayoutRoot>, public DartWrappable {
+    DEFINE_WRAPPERTYPEINFO();
+public:
+    LayoutRoot();
+    ~LayoutRoot() override;
+
+    static PassRefPtr<LayoutRoot> create();
+
+    Element* rootElement() const;
+    void setRootElement(Element*);
+
+    void layout();
+
+    LayoutUnit minWidth() const { return m_minWidth; }
+    void setMinWidth(LayoutUnit width) { m_minWidth = width; }
+
+    LayoutUnit maxWidth() const { return m_maxWidth; }
+    void setMaxWidth(LayoutUnit width) { m_maxWidth = width; }
+
+    LayoutUnit minHeight() const { return m_minHeight; }
+    void setMinHeight(LayoutUnit height) { m_minHeight = height; }
+
+    LayoutUnit maxHeight() const { return m_maxHeight; }
+    void setMaxHeight(LayoutUnit height) { m_maxHeight = height; }
+
+private:
+    LayoutUnit m_minWidth;
+    LayoutUnit m_maxWidth;
+    LayoutUnit m_minHeight;
+    LayoutUnit m_maxHeight;
+    RefPtr<Document> m_document;
+    RefPtr<LocalFrame> m_frame;
+
+    // TODO(eseidel): All of these should be removed:
+    OwnPtr<Settings> m_settings;
+    OwnPtr<FrameHost> m_frameHost;
+};
+
+} // namespace blink
+
+#endif  // SKY_ENGINE_CORE_PAINTING_LAYOUTROOT_H_