Switch line layout to LayoutUnit.

Source/core/layout/LayoutDeprecatedFlexibleBox.cpp

Index: Source/core/layout/LayoutDeprecatedFlexibleBox.cpp
diff --git a/Source/core/layout/LayoutDeprecatedFlexibleBox.cpp b/Source/core/layout/LayoutDeprecatedFlexibleBox.cpp
index 2eb1758ae5dce4ca3530e4699ed9132b1a6c74f9..10031bcf65914231abe36dd2816aaa0ddeee740b 100644
--- a/Source/core/layout/LayoutDeprecatedFlexibleBox.cpp
+++ b/Source/core/layout/LayoutDeprecatedFlexibleBox.cpp
@@ -918,7 +918,7 @@ void LayoutDeprecatedFlexibleBox::applyLineClamp(FlexBoxIterator& iterator, bool
         // Let the truncation code kick in.
         // FIXME: the text alignment should be recomputed after the width changes due to truncation.
         LayoutUnit blockLeftEdge = destBlock.logicalLeftOffsetForLine(lastVisibleLine->y(), false);
-        lastVisibleLine->placeEllipsis(ellipsisStr, leftToRight, blockLeftEdge.toFloat(), blockRightEdge.toFloat(), totalWidth);
+        lastVisibleLine->placeEllipsis(ellipsisStr, leftToRight, blockLeftEdge, blockRightEdge, totalWidth);
         destBlock.setHasMarkupTruncation(true);
     }
 }