Underline Thickness is not uniform

Source/core/rendering/RootInlineBox.cpp

Index: Source/core/rendering/RootInlineBox.cpp
diff --git a/Source/core/rendering/RootInlineBox.cpp b/Source/core/rendering/RootInlineBox.cpp
index 3bcc6fd62bd62739c7a7072201df1d01d85148fe..9c205fede11645163e1d2cad0c0ea05a98bc6d17 100644
--- a/Source/core/rendering/RootInlineBox.cpp
+++ b/Source/core/rendering/RootInlineBox.cpp
@@ -175,6 +175,16 @@ void RootInlineBox::paint(PaintInfo& paintInfo, const LayoutPoint& paintOffset,
     paintEllipsisBox(paintInfo, paintOffset, lineTop, lineBottom);
 }
 
+void RootInlineBox::paintDecorationStyle(PaintInfo& paintInfo, const LayoutPoint& paintOffset, LayoutUnit lineTop, LayoutUnit lineBottom, float underlineThickness)
+{
+    InlineFlowBox::paintDecorationStyle(paintInfo, paintOffset, lineTop, lineBottom);
+}
+
+void RootInlineBox::getPaintDecorationSyle(PaintInfo& paintInfo, const LayoutPoint& paintOffset, float * underlineThickness, TextDecorationStyle * style)
+{
+    InlineFlowBox::getPaintDecorationSyle(paintInfo, paintOffset, underlineThickness, style);
+}
+
 bool RootInlineBox::nodeAtPoint(const HitTestRequest& request, HitTestResult& result, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, LayoutUnit lineTop, LayoutUnit lineBottom)
 {
     if (hasEllipsisBox() && visibleToHitTestRequest(request)) {