Cleanup: Remove LayoutRegion.

Source/core/layout/LayoutRegion.h

Index: Source/core/layout/LayoutRegion.h
diff --git a/Source/core/layout/LayoutRegion.h b/Source/core/layout/LayoutRegion.h
deleted file mode 100644
index bfec91456b09f9b9674143d3970dd37205c1c7ef..0000000000000000000000000000000000000000
--- a/Source/core/layout/LayoutRegion.h
+++ /dev/null
@@ -1,86 +0,0 @@
-/*
- * Copyright (C) 2011 Adobe Systems Incorporated. All rights reserved.
- *
- * 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.
- * 2. 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.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER "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 HOLDER 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 LayoutRegion_h
-#define LayoutRegion_h
-
-#include "core/CoreExport.h"
-#include "core/layout/LayoutBlockFlow.h"
-
-namespace blink {
-
-class LayoutFlowThread;
-
-class CORE_EXPORT LayoutRegion : public LayoutBlockFlow {
-public:
-    explicit LayoutRegion(Element*, LayoutFlowThread*);
-
-    virtual bool isOfType(LayoutObjectType type) const override { return type == LayoutObjectLayoutRegion || LayoutBlockFlow::isOfType(type); }
-
-    virtual LayoutRect flowThreadPortionRect() const = 0;
-    LayoutRect flowThreadPortionOverflowRect() const;
-    LayoutRect overflowRectForFlowThreadPortion(const LayoutRect& flowThreadPortionRect, bool isFirstPortion, bool isLastPortion) const;
-
-    LayoutFlowThread* flowThread() const { return m_flowThread; }
-
-    // Valid regions do not create circular dependencies with other flows.
-    bool isValid() const { return m_isValid; }
-    void setIsValid(bool valid) { m_isValid = valid; }
-
-    bool isFirstRegion() const;
-    bool isLastRegion() const;
-
-    // These methods represent the width and height of a "page" and for a LayoutRegion they are just
-    // the content width and content height of a region. For LayoutMultiColumnSets, however, they
-    // will be the width and height of a single column or page in the set.
-    virtual LayoutUnit pageLogicalWidth() const;
-    virtual LayoutUnit pageLogicalHeight() const;
-
-    virtual bool canHaveChildren() const override final { return false; }
-
-    virtual const char* name() const override { return "LayoutRegion"; }
-
-protected:
-    virtual void computeIntrinsicLogicalWidths(LayoutUnit& minLogicalWidth, LayoutUnit& maxLogicalWidth) const override final;
-
-private:
-    virtual void layoutBlock(bool relayoutChildren) override final;
-
-protected:
-    LayoutFlowThread* m_flowThread;
-
-private:
-    bool m_isValid : 1;
-};
-
-DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutRegion, isLayoutRegion());
-
-} // namespace blink
-
-#endif // LayoutRegion_h