Remove SkSurfaceProps gamma-correctness flag entirely.

gm/textblobgeometrychange.cpp

Index: gm/textblobgeometrychange.cpp
diff --git a/gm/textblobgeometrychange.cpp b/gm/textblobgeometrychange.cpp
index a241c5c7ba611f659c169da7a1e67842bf4ef606..1b7bff319d4bad46595631eb00ea352fbd2ebd7d 100644
--- a/gm/textblobgeometrychange.cpp
+++ b/gm/textblobgeometrychange.cpp
@@ -44,10 +44,7 @@ protected:
 
         SkImageInfo info = SkImageInfo::MakeN32(200, 200, kPremul_SkAlphaType,
                                                 sk_ref_sp(canvas->imageInfo().colorSpace()));
-        SkSurfaceProps canvasProps(SkSurfaceProps::kLegacyFontHost_InitType);
-        uint32_t gammaCorrect = canvas->getProps(&canvasProps)
-            ? canvasProps.flags() & SkSurfaceProps::kGammaCorrect_Flag : 0;
-        SkSurfaceProps props(gammaCorrect, kUnknown_SkPixelGeometry);
+        SkSurfaceProps props(0, kUnknown_SkPixelGeometry);
         auto surface = canvas->makeSurface(info, &props);
         if (!surface) {
             surface = SkSurface::MakeRaster(info, &props);