Delete the GTK+ port of Chrome.

ui/gfx/skia_utils_gtk.cc

-// Copyright (c) 2012 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.
-
-#include "ui/gfx/skia_utils_gtk.h"
-
-#include <gdk/gdk.h>
-
-namespace gfx {
-
-const int kSkiaToGDKMultiplier = 257;
-
-// GDK_COLOR_RGB multiplies by 257 (= 0x10001) to distribute the bits evenly
-// See: http://www.mindcontrol.org/~hplus/graphics/expand-bits.html
-// To get back, we can just right shift by eight
-// (or, formulated differently, i == (i*257)/256 for all i < 256).
-
-SkColor GdkColorToSkColor(GdkColor color) {
-  return SkColorSetRGB(color.red >> 8, color.green >> 8, color.blue >> 8);
-}
-
-GdkColor SkColorToGdkColor(SkColor color) {
-  GdkColor gdk_color = {
-      0,
-      static_cast<guint16>(SkColorGetR(color) * kSkiaToGDKMultiplier),
-      static_cast<guint16>(SkColorGetG(color) * kSkiaToGDKMultiplier),
-      static_cast<guint16>(SkColorGetB(color) * kSkiaToGDKMultiplier)
-  };
-  return gdk_color;
-}
-
-}  // namespace gfx