Better handling border color style decoration

Source/core/paint/ObjectPainter.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef ObjectPainter_h
 #define ObjectPainter_h
 
 #include "core/rendering/style/RenderStyleConstants.h"
 
 namespace blink {
@@ skipping 15 matching lines @@
 
     static void drawLineForBoxSide(GraphicsContext*, int x1, int y1, int x2, int y2, BoxSide, Color, EBorderStyle, int adjbw1, int adjbw2, bool antialias = false);
     static void drawDashedOrDottedBoxSide(GraphicsContext*, int x1, int y1, int x2, int y2,
         BoxSide, Color, int thickness, EBorderStyle, bool antialias);
     static void drawDoubleBoxSide(GraphicsContext*, int x1, int y1, int x2, int y2,
         int length, BoxSide, Color, int thickness, int adjacentWidth1, int adjacentWidth2, bool antialias);
     static void drawRidgeOrGrooveBoxSide(GraphicsContext*, int x1, int y1, int x2, int y2,
         BoxSide, Color, EBorderStyle, int adjacentWidth1, int adjacentWidth2, bool antialias);
     static void drawSolidBoxSide(GraphicsContext*, int x1, int y1, int x2, int y2,
         BoxSide, Color, int adjacentWidth1, int adjacentWidth2, bool antialias);
+    static void calculateBorderStyleColor(const EBorderStyle&, const BoxSide&, Color&);
 private:
 
     RenderObject& m_renderObject;
 };
 
 } // namespace blink
 
 #endif