Rename SkColorSpace::GammaNamed to SkColorSpace::RenderTargetGamma

gm/color4f.cpp

Index: gm/color4f.cpp
diff --git a/gm/color4f.cpp b/gm/color4f.cpp
index b3be57bdf9d0525e3b805391bfdbd09c94d22ffd..2f8684293d547f2af164d3d725e398c1662c123d 100644
--- a/gm/color4f.cpp
+++ b/gm/color4f.cpp
@@ -112,8 +112,8 @@ DEF_SIMPLE_GM(color4shader, canvas, 1024, 260) {
         sk_sp<SkShader> shaders[] {
             SkShader::MakeColorShader(c4, nullptr),
             SkShader::MakeColorShader(c4, SkColorSpace::NewNamed(SkColorSpace::kSRGB_Named)),
-            SkShader::MakeColorShader(c4, SkColorSpace::NewRGB(SkColorSpace::kLinear_GammaNamed,
-                                                               mat)),
+            SkShader::MakeColorShader(c4,
+                    SkColorSpace::NewRGB(SkColorSpace::kLinear_RenderTargetGamma, mat)),
         };
 
         canvas->save();