Removed makeLinearGamma() from the public API for SkColorSpace

bench/nanobench.cpp

Index: bench/nanobench.cpp
diff --git a/bench/nanobench.cpp b/bench/nanobench.cpp
index 8d42b12f5e6ccc370451d509be65f9afe4c76770..e929a8069f36ec65a7b6deb555ea88672d07e559 100644
--- a/bench/nanobench.cpp
+++ b/bench/nanobench.cpp
@@ -459,8 +459,9 @@ static void create_config(const SkCommandLineConfig* config, SkTArray<Config>* c
         auto srgbColorSpace = SkColorSpace::NewNamed(SkColorSpace::kSRGB_Named);
         CPU_CONFIG(srgb, kRaster_Backend,
                    kN32_SkColorType,  kPremul_SkAlphaType, srgbColorSpace)
+        auto srgbLinearColorSpace = SkColorSpace::NewNamed(SkColorSpace::kSRGBLinear_Named);
         CPU_CONFIG(f16,  kRaster_Backend,
-                   kRGBA_F16_SkColorType, kPremul_SkAlphaType, srgbColorSpace->makeLinearGamma())
+                   kRGBA_F16_SkColorType, kPremul_SkAlphaType, srgbLinearColorSpace)
     }
 
     #undef CPU_CONFIG