Draw a single underline for text-decoration-style: [dashed, dotted].

Source/core/rendering/RenderBoxModelObject.h

Index: Source/core/rendering/RenderBoxModelObject.h
diff --git a/Source/core/rendering/RenderBoxModelObject.h b/Source/core/rendering/RenderBoxModelObject.h
index 24ec1579fa479530d36472fabacf0d3fcb814d77..5a3ad4a812ceb38feb29d77a0a6b85feed316311 100644
--- a/Source/core/rendering/RenderBoxModelObject.h
+++ b/Source/core/rendering/RenderBoxModelObject.h
@@ -262,13 +262,13 @@ protected:
 
     LayoutRect localCaretRectForEmptyElement(LayoutUnit width, LayoutUnit textIndentOffset);
 
-    static bool shouldAntialiasLines(GraphicsContext*);
-
     static void clipRoundedInnerRect(GraphicsContext*, const LayoutRect&, const RoundedRect& clipRect);
 
     bool hasAutoHeightOrContainingBlockWithAutoHeight() const;
 
 public:
+    static bool shouldAntialiasLines(GraphicsContext*);

[Stephen Chennney, 2014/03/05 15:59:35]

I'm appalled at the runtime cost of implementing this method. We ask the
Graphics context for the current transform, which means we create an entire
AffineTransform from a SkMatrix, then we figure out what properties the matrix
has. I would love to know how often the answer is false.

+
     // For RenderBlocks and RenderInlines with m_style->styleType() == FIRST_LETTER, this tracks their remaining text fragments
     RenderTextFragment* firstLetterRemainingText() const;
     void setFirstLetterRemainingText(RenderTextFragment*);