Revert "Revert "First iteration on custom layout.""

sky/engine/core/rendering/RenderCustomLayout.h

+// 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_RENDERING_RENDERCUSTOMLAYOUT_H_
+#define SKY_ENGINE_CORE_RENDERING_RENDERCUSTOMLAYOUT_H_
+
+#include "sky/engine/core/rendering/RenderBlock.h"
+
+namespace blink {
+
+class RenderCustomLayout : public RenderBlock {
+public:
+    explicit RenderCustomLayout(ContainerNode* node);
+    virtual void layout() override;
+    const char* renderName() const;
+
+protected:
+    virtual ~RenderCustomLayout();
+};
+
+} // namespace blink
+
+#endif  // SKY_ENGINE_CORE_RENDERING_RENDERCUSTOMLAYOUT_H_