color: Ensure that VideoResourceUpdater give consistent colors

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 <ostream>
 
 #include "base/gtest_prod_util.h"
 #include "base/macros.h"
 #include "build/build_config.h"
 #include "third_party/skia/include/core/SkColorSpace.h"
 #include "ui/gfx/gfx_export.h"
 
 namespace IPC {
 template <class P>
 struct ParamTraits;
@@ skipping 118 matching lines @@
   static ColorSpace CreateSCRGBLinear();
 
   // TODO: Remove these, and replace with more generic constructors.
   static ColorSpace CreateJpeg();
   static ColorSpace CreateREC601();
   static ColorSpace CreateREC709();
 
   bool operator==(const ColorSpace& other) const;
   bool operator!=(const ColorSpace& other) const;
   bool operator<(const ColorSpace& other) const;
+  std::string ToString() const;
 
   bool IsHDR() const;
 
+  // Return this color space with any range adjust or YUV to RGB conversion
+  // stripped off.
+  gfx::ColorSpace GetAsFullRangeRGB() const;
+
   // This will return nullptr for non-RGB spaces, spaces with non-FULL
   // range, and unspecified spaces.
   sk_sp<SkColorSpace> ToSkColorSpace() const;
 
   // Return an SkColorSpace that represents this color space, with output-space
   // blending (which is only linear for color spaces with a linear tranasfer
   // function).
   sk_sp<SkColorSpace> ToNonlinearBlendedSkColorSpace() const;
 
   // Populate |icc_profile| with an ICC profile that represents this color
-  // space. Returns false if this space is not representable. This ICC profile
-  // will be constructed ignoring the range adjust and transfer matrices (this
-  // is to match the IOSurface interface which takes the ICC profile and range
-  // and transfer matrices separately).
+  // space. Returns false if this space is not representable.
   bool GetICCProfile(ICCProfile* icc_profile) const;
 
   void GetPrimaryMatrix(SkMatrix44* to_XYZD50) const;
   bool GetTransferFunction(SkColorSpaceTransferFn* fn) const;
   bool GetInverseTransferFunction(SkColorSpaceTransferFn* fn) const;
 
   // For most formats, this is the RGB to YUV matrix.
   void GetTransferMatrix(SkMatrix44* matrix) const;
   void GetRangeAdjustMatrix(SkMatrix44* matrix) const;
 
@@ skipping 21 matching lines @@
   sk_sp<SkColorSpace> icc_profile_sk_color_space_;
 
   friend class ICCProfile;
   friend class ColorTransform;
   friend class ColorTransformInternal;
   friend class ColorSpaceWin;
   friend struct IPC::ParamTraits<gfx::ColorSpace>;
   FRIEND_TEST_ALL_PREFIXES(SimpleColorSpace, GetColorSpace);
 };
 
+// Stream operator so ColorSpace can be used in assertion statements.
+GFX_EXPORT std::ostream& operator<<(std::ostream& out,
+                                    const ColorSpace& color_space);
+
 }  // namespace gfx
 
 #endif  // UI_GFX_COLOR_SPACE_H_