Switch line layout to LayoutUnit.

Source/core/layout/line/RootInlineBox.h

Index: Source/core/layout/line/RootInlineBox.h
diff --git a/Source/core/layout/line/RootInlineBox.h b/Source/core/layout/line/RootInlineBox.h
index 6e10125df17b615fbf1df4d77bc210befcb83c19..18ff6b7c6323520ca5e7ad9fe8e4a41db6255df9 100644
--- a/Source/core/layout/line/RootInlineBox.h
+++ b/Source/core/layout/line/RootInlineBox.h
@@ -21,7 +21,6 @@
 #ifndef RootInlineBox_h
 #define RootInlineBox_h
 
-#include "core/layout/line/FloatToLayoutUnit.h"
 #include "core/layout/line/InlineFlowBox.h"
 #include "platform/text/BidiContext.h"
 
@@ -47,7 +46,7 @@ public:
     RootInlineBox* nextRootBox() const { return static_cast<RootInlineBox*>(m_nextLineBox); }
     RootInlineBox* prevRootBox() const { return static_cast<RootInlineBox*>(m_prevLineBox); }
 
-    virtual void adjustPosition(FloatWillBeLayoutUnit dx, FloatWillBeLayoutUnit dy) override final;
+    virtual void adjustPosition(LayoutUnit dx, LayoutUnit dy) override final;
 
     LayoutUnit lineTop() const { return m_lineTop; }
     LayoutUnit lineBottom() const { return m_lineBottom; }
@@ -93,9 +92,9 @@ public:
 
     bool lineCanAccommodateEllipsis(bool ltr, int blockEdge, int lineBoxEdge, int ellipsisWidth);
     // Return the truncatedWidth, the width of the truncated text + ellipsis.
-    FloatWillBeLayoutUnit placeEllipsis(const AtomicString& ellipsisStr, bool ltr, FloatWillBeLayoutUnit blockLeftEdge, FloatWillBeLayoutUnit blockRightEdge, FloatWillBeLayoutUnit ellipsisWidth);
+    LayoutUnit placeEllipsis(const AtomicString& ellipsisStr, bool ltr, LayoutUnit blockLeftEdge, LayoutUnit blockRightEdge, LayoutUnit ellipsisWidth);
     // Return the position of the EllipsisBox or -1.
-    virtual FloatWillBeLayoutUnit placeEllipsisBox(bool ltr, FloatWillBeLayoutUnit blockLeftEdge, FloatWillBeLayoutUnit blockRightEdge, FloatWillBeLayoutUnit ellipsisWidth, FloatWillBeLayoutUnit &truncatedWidth, bool& foundBox) override final;
+    virtual LayoutUnit placeEllipsisBox(bool ltr, LayoutUnit blockLeftEdge, LayoutUnit blockRightEdge, LayoutUnit ellipsisWidth, LayoutUnit &truncatedWidth, bool& foundBox) override final;
 
     using InlineBox::hasEllipsisBox;
     EllipsisBox* ellipsisBox() const;
@@ -171,7 +170,7 @@ public:
     }
 
     // Used to calculate the underline offset for TextUnderlinePositionUnder.
-    FloatWillBeLayoutUnit maxLogicalTop() const;
+    LayoutUnit maxLogicalTop() const;
 
     Node* getLogicalStartBoxWithNode(InlineBox*&) const;
     Node* getLogicalEndBoxWithNode(InlineBox*&) const;