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diff --git a/app/gfx/color_utils.h b/app/gfx/color_utils.h
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+// Copyright (c) 2006-2008 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 "skia/include/SkColor.h"
+
+class SkBitmap;
+
+namespace color_utils {
+
+// Represents set of CIE XYZ tristimulus values.
+struct CIE_XYZ {
+  double X;
+  double Y; // luminance
+  double Z;
+};
+
+// Represents a L*a*b* color value
+struct LabColor {
+  int L;
+  int a;
+  int b;
+};
+
+// Note: these transformations assume sRGB as the source color space
+
+// Convert between different color spaces
+void SkColorToCIEXYZ(SkColor c, CIE_XYZ* xyz);
+void CIEXYZToLabColor(const CIE_XYZ& xyz, LabColor* lab);
+
+SkColor CIEXYZToSkColor(SkAlpha alpha, const CIE_XYZ& xyz);
+void LabColorToCIEXYZ(const LabColor& lab, CIE_XYZ* xyz);
+
+void SkColorToLabColor(SkColor c, LabColor* lab);
+SkColor LabColorToSkColor(const LabColor& lab, SkAlpha alpha);
+
+// 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]);
+
+// Create a color from a base color and a specific alpha value.
+SkColor SetColorAlpha(SkColor c, SkAlpha alpha);
+
+// Gets a Windows system color as a SkColor
+SkColor GetSysSkColor(int which);
+
+} // namespace color_utils
+
+#endif  // #ifndef APP_GFX_COLOR_UTILS_H_