Making LayoutUnit conversions to Float type explicit

Source/core/rendering/RenderMultiColumnSet.cpp

Index: Source/core/rendering/RenderMultiColumnSet.cpp
diff --git a/Source/core/rendering/RenderMultiColumnSet.cpp b/Source/core/rendering/RenderMultiColumnSet.cpp
index 9b1394b9a7bb75a0432de1763afe9e4483e9ec9c..697fab41b7bd649f87d22d5df26b1f92912edf59 100644
--- a/Source/core/rendering/RenderMultiColumnSet.cpp
+++ b/Source/core/rendering/RenderMultiColumnSet.cpp
@@ -292,7 +292,7 @@ unsigned RenderMultiColumnSet::columnCount() const
     if (!logicalHeightInColumns)
         return 1;
 
-    unsigned count = ceil(static_cast<float>(logicalHeightInColumns) / computedColumnHeight());
+    unsigned count = ceil(logicalHeightInColumns.toFloat() / computedColumnHeight().toFloat());
     ASSERT(count >= 1);
     return count;
 }
@@ -331,7 +331,7 @@ unsigned RenderMultiColumnSet::columnIndexAtOffset(LayoutUnit offset, ColumnInde
     }
 
     // Just divide by the column height to determine the correct column.
-    return static_cast<float>(offset - flowThreadLogicalTop) / computedColumnHeight();
+    return (offset - flowThreadLogicalTop).toFloat() / computedColumnHeight().toFloat();
 }
 
 LayoutRect RenderMultiColumnSet::flowThreadPortionRectAt(unsigned index) const