HDR preparations

ui/gfx/color_space.h

Index: ui/gfx/color_space.h
diff --git a/ui/gfx/color_space.h b/ui/gfx/color_space.h
index c9e9038619678dba0d9eee20f06ef66a75a8e7b3..df90dabaff1d773ee594d960b5d246bd692c0487 100644
--- a/ui/gfx/color_space.h
+++ b/ui/gfx/color_space.h
@@ -150,6 +150,9 @@ class GFX_EXPORT ColorSpace {
   static MatrixID MatrixIDFromInt(int matrix_id);
 
   static ColorSpace CreateSRGB();
+  // scRGB is like RGB, but linear and values outside of 0-1 are allowed.
+  // scRGB is normally used with fp16 textures.
+  static ColorSpace CreateSCRGBLinear();
   static ColorSpace CreateXYZD50();
 
   // TODO: Remove these, and replace with more generic constructors.
@@ -161,6 +164,8 @@ class GFX_EXPORT ColorSpace {
   bool operator!=(const ColorSpace& other) const;
   bool operator<(const ColorSpace& other) const;
 
+  bool IsHDR() const;
+
   // Note that this may return nullptr.
   const sk_sp<SkColorSpace>& ToSkColorSpace() const { return sk_color_space_; }
   static ColorSpace FromSkColorSpace(const sk_sp<SkColorSpace>& sk_color_space);