Remove SkSurfaceProps gamma-correctness flag entirely.

gm/textblobmixedsizes.cpp

Index: gm/textblobmixedsizes.cpp
diff --git a/gm/textblobmixedsizes.cpp b/gm/textblobmixedsizes.cpp
index 8fdf558206136383eef6ceda8a8f438806747f71..4e3f0eaeb58f4c6d11e2aa7fd8e949276f5d4e47 100644
--- a/gm/textblobmixedsizes.cpp
+++ b/gm/textblobmixedsizes.cpp
@@ -106,10 +106,7 @@ protected:
             sk_sp<SkColorSpace> colorSpace = sk_ref_sp(inputCanvas->imageInfo().colorSpace());
             SkImageInfo info = SkImageInfo::MakeN32(size.width(), size.height(),
                                                     kPremul_SkAlphaType, colorSpace);
-            SkSurfaceProps canvasProps(SkSurfaceProps::kLegacyFontHost_InitType);
-            uint32_t gammaCorrect = inputCanvas->getProps(&canvasProps)
-                ? canvasProps.flags() & SkSurfaceProps::kGammaCorrect_Flag : 0;
-            SkSurfaceProps props(SkSurfaceProps::kUseDeviceIndependentFonts_Flag | gammaCorrect,
+            SkSurfaceProps props(SkSurfaceProps::kUseDeviceIndependentFonts_Flag,
                                  SkSurfaceProps::kLegacyFontHost_InitType);
             surface = SkSurface::MakeRenderTarget(ctx, SkBudgeted::kNo, info, 0, &props);
             canvas = surface.get() ? surface->getCanvas() : inputCanvas;