Get rid of lazy block.

Source/core/rendering/RenderLazyBlock.h

Index: Source/core/rendering/RenderLazyBlock.h
diff --git a/Source/core/rendering/RenderLazyBlock.h b/Source/core/rendering/RenderLazyBlock.h
deleted file mode 100644
index 5f13f90efdc29ba0bfcf16d62257db59221a0588..0000000000000000000000000000000000000000
--- a/Source/core/rendering/RenderLazyBlock.h
+++ /dev/null
@@ -1,95 +0,0 @@
-/*
- * Copyright (C) 2013 Google Inc. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#ifndef RenderLazyBlock_h
-#define RenderLazyBlock_h
-
-#include "core/rendering/RenderBlock.h"
-
-namespace WebCore {
-
-class RenderLazyBlock FINAL : public RenderBlock {
-public:
-    RenderLazyBlock(Element*);
-    virtual ~RenderLazyBlock();
-
-    bool isAttached() const { return m_attached; }
-    bool isNested() const;
-
-    void markForNestedLayout()
-    {
-        setNeedsLayout();
-        m_isNestedLayout = true;
-    }
-
-    RenderLazyBlock* next() const { return m_next; }
-    RenderLazyBlock* previous() const { return m_previous; }
-
-    RenderBox* firstVisibleChildBox() const { return m_firstVisibleChildBox; }
-    RenderBox* lastVisibleChildBox() const { return m_lastVisibleChildBox; }
-
-private:
-    virtual void paintChildren(PaintInfo&, const LayoutPoint&) OVERRIDE;
-
-    virtual bool isRenderLazyBlock() const OVERRIDE { return true; }
-    virtual void willBeDestroyed() OVERRIDE;
-    virtual void willBeRemovedFromTree() OVERRIDE;
-    virtual void layoutBlock(bool relayoutChildren, LayoutUnit pageLogicalHeight) OVERRIDE;
-
-    void layoutChildren(bool relayoutChildren);
-
-    void attachLazyBlock();
-    void detachLazyBlock();
-
-    RenderLazyBlock* m_next;
-    RenderLazyBlock* m_previous;
-    RenderBox* m_firstVisibleChildBox;
-    RenderBox* m_lastVisibleChildBox;
-    bool m_attached;
-    bool m_isNestedLayout;
-    LayoutRect m_intersectRect;
-    IntRect m_expandedViewportRect;
-};
-
-inline RenderLazyBlock* toRenderLazyBlock(RenderObject* object)
-{
-    ASSERT_WITH_SECURITY_IMPLICATION(!object || object->isRenderLazyBlock());
-    return static_cast<RenderLazyBlock*>(object);
-}
-
-inline const RenderLazyBlock* toRenderLazyBlock(const RenderObject* object)
-{
-    ASSERT_WITH_SECURITY_IMPLICATION(!object || object->isRenderLazyBlock());
-    return static_cast<const RenderLazyBlock*>(object);
-}
-
-} // namespace WebCore
-
-#endif // RenderLazyBlock_h