Update callsites to new SkColorSpace API, delete legacy flag

ui/gfx/color_space.cc

Index: ui/gfx/color_space.cc
diff --git a/ui/gfx/color_space.cc b/ui/gfx/color_space.cc
index 7a1f8cb2dc276a9d231c9280a83c78a6a5014d2b..e0eb7b946dab4b43cafbea8b3e03265cf2756beb 100644
--- a/ui/gfx/color_space.cc
+++ b/ui/gfx/color_space.cc
@@ -234,9 +234,9 @@ sk_sp<SkColorSpace> ColorSpace::ToSkColorSpace() const {
   // Use the named SRGB and linear-SRGB instead of the generic constructors.
   if (primaries_ == PrimaryID::BT709) {
     if (transfer_ == TransferID::IEC61966_2_1)
-      return SkColorSpace::MakeNamed(SkColorSpace::kSRGB_Named);
+      return SkColorSpace::MakeSRGB();
     if (transfer_ == TransferID::LINEAR || transfer_ == TransferID::LINEAR_HDR)
-      return SkColorSpace::MakeNamed(SkColorSpace::kSRGBLinear_Named);
+      return SkColorSpace::MakeSRGBLinear();
   }
 
   SkMatrix44 to_xyz_d50;