color: Add color spin primaries for layout tests

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 aaca2de3ab38dec94a97f2a0b3575b6eb75d99f2..35d34257f694c0cfb86aeb337fc450878db6f58a 100644
--- a/ui/gfx/color_space.h
+++ b/ui/gfx/color_space.h
@@ -45,6 +45,8 @@ class GFX_EXPORT ColorSpace {
     // Corresponds the the primaries of the "Generic RGB" profile used in the
     // Apple ColorSync application, used by layout tests on Mac.
     APPLE_GENERIC_RGB,
+    // A very wide gamut space with rotated primaries. Used by layout tests.
+    WIDE_GAMUT_COLOR_SPIN,
     // Primaries defined by the primary matrix |custom_primary_matrix_|.
     CUSTOM,
     // For color spaces defined by an ICC profile which cannot be represented