Use SkICC in gfx::ICCProfile and gfx::ColorSpace

ui/gfx/color_transform.h

 // Copyright (c) 2016 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 UI_GFX_COLOR_TRANSFORM_H_
 #define UI_GFX_COLOR_TRANSFORM_H_
 
 #include <memory>
 #include <stdint.h>
 
 #include "build/build_config.h"
+#include "ui/gfx/color_space.h"
 #include "ui/gfx/geometry/point3_f.h"
 #include "ui/gfx/gfx_export.h"
 
 namespace gfx {
 
-class ColorSpace;
-
 class GFX_EXPORT ColorTransform {
  public:
   enum class Intent { INTENT_ABSOLUTE, INTENT_PERCEPTUAL, TEST_NO_OPT };
 
   // TriStimulus is a color coordinate in any color space.
   // Channel order is XYZ, RGB or YUV.
   typedef Point3F TriStim;
 
   virtual ~ColorTransform() {}
 
   // Perform transformation of colors, |colors| is both input and output.
   virtual void transform(TriStim* colors, size_t num) = 0;
 
   static std::unique_ptr<ColorTransform> NewColorTransform(
       const ColorSpace& from,
       const ColorSpace& to,
       Intent intent);
+
+  static float ToLinearForTesting(ColorSpace::TransferID id, float v);
+  static float FromLinearForTesting(ColorSpace::TransferID id, float v);
 };
 }  // namespace gfx
 
 #endif  // UI_GFX_COLOR_TRANSFORM_H_