Adjust color for printing list-item markers as we do for text.

third_party/WebKit/Source/core/paint/TextPainter.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 TextPainter_h
 #define TextPainter_h
 
 #include "core/CoreExport.h"
 #include "core/style/ComputedStyleConstants.h"
 #include "platform/fonts/TextBlob.h"
@@ skipping 49 matching lines @@
                 && fillColor == other.fillColor
                 && strokeColor == other.strokeColor
                 && emphasisMarkColor == other.emphasisMarkColor
                 && strokeWidth == other.strokeWidth
                 && shadow == other.shadow;
         }
         bool operator!=(const Style& other) { return !(*this == other); }
     };
     static Style textPaintingStyle(LineLayoutItem, const ComputedStyle&, const PaintInfo&);
     static Style selectionPaintingStyle(LineLayoutItem, bool haveSelection, const PaintInfo&, const Style& textStyle);
+    static Color textColorForWhiteBackground(Color);
 
     enum RotationDirection { Counterclockwise, Clockwise };
     static AffineTransform rotation(const LayoutRect& boxRect, RotationDirection);
 
 private:
     void updateGraphicsContext(const Style& style, GraphicsContextStateSaver& saver)
     {
         updateGraphicsContext(m_graphicsContext, style, m_horizontal, saver);
     }
 
@@ skipping 31 matching lines @@
     // 5. Therefore the translation from (3) to (4) is (x(), y()) - (-maxY(), x()) = (x() + maxY(), y() - x())
 
     // A similar argument derives the counter-clockwise case.
     return rotationDirection == Clockwise ? AffineTransform(0, 1, -1, 0, boxRect.x() + boxRect.maxY(), boxRect.y() - boxRect.x())
         : AffineTransform(0, -1, 1, 0, boxRect.x() - boxRect.y(), boxRect.x() + boxRect.maxY());
 }
 
 } // namespace blink
 
 #endif // TextPainter_h