Create LineLayout api

Source/core/layout/api/LineLayoutBlockFlow.h

Index: Source/core/layout/api/LineLayoutBlockFlow.h
diff --git a/Source/core/layout/api/LineLayoutBlockFlow.h b/Source/core/layout/api/LineLayoutBlockFlow.h
new file mode 100644
index 0000000000000000000000000000000000000000..6809138daeb2d9c9021eb5bd8de74673ca457ad5
--- /dev/null
+++ b/Source/core/layout/api/LineLayoutBlockFlow.h
@@ -0,0 +1,67 @@
+// 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 LineLayoutBlockFlow_h
+#define LineLayoutBlockFlow_h
+
+#include "core/layout/FloatingObjects.h"
+#include "core/layout/api/LineLayoutBox.h"
+#include "platform/LayoutUnit.h"
+
+namespace blink {
+
+class LayoutBlockFlow;
+class FloatingObject;
+class LineInfo;
+class LineWidth;
+
+class LineLayoutBlockFlow : public LineLayoutBox {
+public:
+    LineLayoutBlockFlow(LayoutBlockFlow*);
+    LineLayoutBlockFlow(const LineLayoutItem&);
+    LineLayoutBlockFlow() { }
+
+    LineLayoutItem firstChild() const;
+    LineLayoutItem lastChild() const;
+
+    LayoutUnit startAlignedOffsetForLine(LayoutUnit position, bool shouldIndentText);
+
+    LayoutUnit textIndentOffset() const;
+
+    LayoutUnit logicalWidthForChild(const LayoutBox& child) const;
+    LayoutUnit marginStartForChild(const LayoutBoxModelObject&) const;
+    LayoutUnit marginEndForChild(const LayoutBoxModelObject&) const;
+    LayoutUnit marginBeforeForChild(const LayoutBoxModelObject&) const;
+
+    LayoutUnit startOffsetForContent() const;
+
+    LayoutUnit lineHeight(bool firstLine, LineDirectionMode, LinePositionMode) const;
+    LayoutUnit minLineHeightForReplacedObject(bool isFirstLine, LayoutUnit replacedHeight) const;
+
+    void setStaticInlinePositionForChild(LayoutBox&, LayoutUnit inlinePosition);
+    void updateStaticInlinePositionForChild(LayoutBox&, LayoutUnit logicalTop);
+
+    FloatingObject* insertFloatingObject(LayoutBox&);
+    bool positionNewFloats(LineWidth*);
+    bool positionNewFloatOnLine(FloatingObject* newFloat, FloatingObject* lastFloatFromPreviousLine, LineInfo&, LineWidth&);
+    LayoutUnit nextFloatLogicalBottomBelow(LayoutUnit, ShapeOutsideFloatOffsetMode = ShapeOutsideFloatMarginBoxOffset) const;
+    FloatingObject* lastFloatFromPreviousLine() const;
+
+    LayoutUnit logicalTopForFloat(const FloatingObject*) const;
+    LayoutUnit logicalBottomForFloat(const FloatingObject*) const;
+    LayoutUnit logicalLeftForFloat(const FloatingObject*) const;
+    LayoutUnit logicalRightForFloat(const FloatingObject*) const;
+    LayoutUnit logicalWidthForFloat(const FloatingObject*) const;
+
+    LayoutUnit logicalRightOffsetForLine(LayoutUnit position, bool shouldIndentText, LayoutUnit logicalHeight = 0) const;
+    LayoutUnit logicalLeftOffsetForLine(LayoutUnit position, bool shouldIndentText, LayoutUnit logicalHeight = 0) const;
+
+private:
+    LayoutBlockFlow* toBlockFlow();
+    const LayoutBlockFlow* toBlockFlow() const;
+};
+
+} // namespace blink
+
+#endif // LineLayoutBlockFlow_h