ColorTransform, transforms colors from one color space to another

ui/gfx/color_space.h

 // 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.
 
 #ifndef UI_GFX_COLOR_SPACE_H_
 #define UI_GFX_COLOR_SPACE_H_
 
 #include <stdint.h>
 
 #include "base/macros.h"
 #include "build/build_config.h"
 #include "ui/gfx/gfx_export.h"
 
 namespace IPC {
 template <class P>
 struct ParamTraits;
 }  // namespace IPC
 
 namespace gfx {
 
 class ICCProfile;
+class ColorSpaceToColorSpaceTransform;
 
 // Used to represet a color space for the purpose of color conversion.
 // This is designed to be safe and compact enough to send over IPC
 // between any processes.
 class GFX_EXPORT ColorSpace {
  public:
   enum class PrimaryID : uint16_t {
     // The first 0-255 values should match the H264 specification.
     RESERVED0 = 0,
     BT709 = 1,
@@ skipping 75 matching lines @@
     LAST = LIMITED
   };
 
   ColorSpace();
   ColorSpace(PrimaryID primaries,
              TransferID transfer,
              MatrixID matrix,
              RangeID full_range);
 
   static ColorSpace CreateSRGB();
+  static ColorSpace CreateXYZD50();
 
   // TODO: Remove these, and replace with more generic constructors.
   static ColorSpace CreateJpeg();
   static ColorSpace CreateREC601();
   static ColorSpace CreateREC709();
 
   bool operator==(const ColorSpace& other) const;
 
  private:
   PrimaryID primaries_;
   TransferID transfer_;
   MatrixID matrix_;
   RangeID range_;
 
   // This is used to look up the ICCProfile from which this ColorSpace was
   // created, if possible.
   uint64_t icc_profile_id_ = 0;
 
   friend class ICCProfile;
+  friend class ColorSpaceToColorSpaceTransform;
   friend struct IPC::ParamTraits<gfx::ColorSpace>;
 };
 
 }  // namespace gfx
 
 #endif  // UI_GFX_COLOR_SPACE_H_