Get rid of background-clip:text and PaintBehaviorForceBlackText.

sky/engine/platform/graphics/Color.h

 /*
  * Copyright (C) 2003, 2004, 2005, 2006, 2010 Apple 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 27 matching lines @@
 typedef unsigned RGBA32; // RGBA quadruplet
 
 PLATFORM_EXPORT RGBA32 makeRGB(int r, int g, int b);
 PLATFORM_EXPORT RGBA32 makeRGBA(int r, int g, int b, int a);
 
 PLATFORM_EXPORT RGBA32 colorWithOverrideAlpha(RGBA32 color, float overrideAlpha);
 PLATFORM_EXPORT RGBA32 makeRGBA32FromFloats(float r, float g, float b, float a);
 PLATFORM_EXPORT RGBA32 makeRGBAFromHSLA(double h, double s, double l, double a);
 PLATFORM_EXPORT RGBA32 makeRGBAFromCMYKA(float c, float m, float y, float k, float a);
 
-PLATFORM_EXPORT int differenceSquared(const Color&, const Color&);
-
 inline int redChannel(RGBA32 color) { return (color >> 16) & 0xFF; }
 inline int greenChannel(RGBA32 color) { return (color >> 8) & 0xFF; }
 inline int blueChannel(RGBA32 color) { return color & 0xFF; }
 inline int alphaChannel(RGBA32 color) { return (color >> 24) & 0xFF; }
 
 struct NamedColor {
     const char* name;
     unsigned ARGBValue;
 };
 
@@ skipping 107 matching lines @@
     }
 
     return Color(blend(from.red(), to.red(), progress),
                  blend(from.green(), to.green(), progress),
                  blend(from.blue(), to.blue(), progress),
                  blend(from.alpha(), to.alpha(), progress));
 }
 } // namespace blink
 
 #endif  // SKY_ENGINE_PLATFORM_GRAPHICS_COLOR_H_