Create LineLayout api

Source/core/layout/line/LineWidth.h

 /*
  * Copyright (C) 2013 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.
@@ skipping 12 matching lines @@
  * 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 LineWidth_h
 #define LineWidth_h
 
+#include "core/layout/api/LineLayoutBlockFlow.h"
 #include "platform/LayoutUnit.h"
 
 namespace blink {
 
 class FloatingObject;
 class LayoutObject;
 class LayoutRubyRun;
-class LayoutBlockFlow;
 
 enum IndentTextOrNot { DoNotIndentText, IndentText };
 enum WhitespaceTreatment { ExcludeWhitespace, IncludeWhitespace };
 
 class LineWidth {
 public:
-    LineWidth(LayoutBlockFlow&, bool isFirstLine, IndentTextOrNot shouldIndentText);
+    LineWidth(LineLayoutBlockFlow, bool isFirstLine, IndentTextOrNot shouldIndentText);
 
     bool fitsOnLine() const { return currentWidth() <= (m_availableWidth + LayoutUnit::epsilon()); }
     bool fitsOnLine(float extra) const { return currentWidth() + extra <= (m_availableWidth + LayoutUnit::epsilon()); }
     bool fitsOnLine(float extra, WhitespaceTreatment whitespaceTreatment) const
     {
         return currentWidth() - (whitespaceTreatment == ExcludeWhitespace ? trailingWhitespaceWidth() : 0) + extra <= (m_availableWidth + LayoutUnit::epsilon());
     }
 
     float currentWidth() const { return m_committedWidth + m_uncommittedWidth; }
     // FIXME: We should eventually replace these three functions by ones that work on a higher abstraction.
@@ skipping 10 matching lines @@
     void fitBelowFloats(bool isFirstLine = false);
     void setTrailingWhitespaceWidth(float width) { m_trailingWhitespaceWidth = width; }
 
     bool shouldIndentText() const { return m_shouldIndentText == IndentText; }
 
 private:
     void computeAvailableWidthFromLeftAndRight();
     void updateLineDimension(LayoutUnit newLineTop, LayoutUnit newLineWidth, const float& newLineLeft, const float& newLineRight);
     void wrapNextToShapeOutside(bool isFirstLine);
 
-    LayoutBlockFlow& m_block;
+    LineLayoutBlockFlow m_block;
     float m_uncommittedWidth;
     float m_committedWidth;
     float m_overhangWidth; // The amount by which |m_availableWidth| has been inflated to account for possible contraction due to ruby overhang.
     float m_trailingWhitespaceWidth;
     float m_left;
     float m_right;
     float m_availableWidth;
     bool m_isFirstLine;
     IndentTextOrNot m_shouldIndentText;
 };
 
 }
 
 #endif // LineWidth_h