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diff --git a/app/gfx/color_utils.h b/app/gfx/color_utils.h
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--- a/app/gfx/color_utils.h
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@@ -1,77 +0,0 @@
-// Copyright (c) 2009 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 APP_GFX_COLOR_UTILS_H_
-#define APP_GFX_COLOR_UTILS_H_
-
-#include "third_party/skia/include/core/SkColor.h"
-
-class SkBitmap;
-
-namespace color_utils {
-
-// Represents an HSL color.
-struct HSL {
-  double h;
-  double s;
-  double l;
-};
-
-// Calculated according to http://www.w3.org/TR/WCAG20/#relativeluminancedef
-double RelativeLuminance(SkColor color);
-
-// Note: these transformations assume sRGB as the source color space
-void SkColorToHSL(SkColor c, HSL* hsl);
-SkColor HSLToSkColor(const HSL& hsl, SkAlpha alpha);
-
-// HSL-Shift an SkColor. The shift values are in the range of 0-1, with the
-// option to specify -1 for 'no change'. The shift values are defined as:
-// hsl_shift[0] (hue): The absolute hue value - 0 and 1 map
-//    to 0 and 360 on the hue color wheel (red).
-// hsl_shift[1] (saturation): A saturation shift, with the
-//    following key values:
-//    0 = remove all color.
-//    0.5 = leave unchanged.
-//    1 = fully saturate the image.
-// hsl_shift[2] (lightness): A lightness shift, with the
-//    following key values:
-//    0 = remove all lightness (make all pixels black).
-//    0.5 = leave unchanged.
-//    1 = full lightness (make all pixels white).
-SkColor HSLShift(SkColor color, const HSL& shift);
-
-// Determine if a given alpha value is nearly completely transparent.
-bool IsColorCloseToTransparent(SkAlpha alpha);
-
-// Determine if a color is near grey.
-bool IsColorCloseToGrey(int r, int g, int b);
-
-// Gets a color representing a bitmap. The definition of "representing" is the
-// average color in the bitmap. The color returned is modified to have the
-// specified alpha.
-SkColor GetAverageColorOfFavicon(SkBitmap* bitmap, SkAlpha alpha);
-
-// Builds a histogram based on the Y' of the Y'UV representation of
-// this image.
-void BuildLumaHistogram(SkBitmap* bitmap, int histogram[256]);
-
-// Returns a blend of the supplied colors, ranging from |background| (for
-// |alpha| == 0) to |foreground| (for |alpha| == 255).
-SkColor AlphaBlend(SkColor foreground, SkColor background, SkAlpha alpha);
-
-// Given a foreground and background color, try to return a foreground color
-// that is "readable" over the background color by luma-inverting the foreground
-// color and then picking whichever foreground color has higher contrast against
-// the background color.
-//
-// NOTE: This won't do anything but waste time if the supplied foreground color
-// has a luma value close to the midpoint (0.5 in the HSL representation).
-SkColor GetReadableColor(SkColor foreground, SkColor background);
-
-// Gets a Windows system color as a SkColor
-SkColor GetSysSkColor(int which);
-
-}  // namespace color_utils
-
-#endif  // APP_GFX_COLOR_UTILS_H_