Paint dotted borders using circular dots

third_party/WebKit/Source/platform/graphics/StrokeData.h

 // Copyright (C) 2013 Google Inc. All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //    * Redistributions of source code must retain the above copyright
 // notice, this list of conditions and the following disclaimer.
 //    * Redistributions in binary form must reproduce the above
 // copyright notice, this list of conditions and the following disclaimer
@@ skipping 64 matching lines @@
   // If a non-zero length is provided, the number of dashes/dots on a
   // dashed/dotted line will be adjusted to start and end that length with a
   // dash/dot.
   void setupPaint(PaintFlags*, int length = 0) const;
 
   // Setup any DashPathEffect on the paint. If a non-zero length is provided,
   // and no line dash has been set, the number of dashes/dots on a dashed/dotted
   // line will be adjusted to start and end that length with a dash/dot.
   void setupPaintDashPathEffect(PaintFlags*, int) const;
 
+  // Determine whether a stroked line should be drawn using dashes. In practice,
+  // we draw dashes when a dashed stroke is specified or when a dotted stroke
+  // is specified but the line width is too small to draw circles.
+  static bool strokeIsDashed(float width, StrokeStyle);
+
  private:
   StrokeStyle m_style;
   float m_thickness;
   PaintFlags::Cap m_lineCap;
   PaintFlags::Join m_lineJoin;
   float m_miterLimit;
   sk_sp<SkPathEffect> m_dash;
 };
 
 }  // namespace blink
 
 #endif  // StrokeData_h