Remove SkSurfaceProps gamma-correctness flag entirely.

gm/textblobrandomfont.cpp

Index: gm/textblobrandomfont.cpp
diff --git a/gm/textblobrandomfont.cpp b/gm/textblobrandomfont.cpp
index 58f0dc6bd6b790eccd2c5aee3b20b4d481d40f05..2e8249fc2c1a0aff51ae9b0219aa4f93c9d4f320 100644
--- a/gm/textblobrandomfont.cpp
+++ b/gm/textblobrandomfont.cpp
@@ -99,10 +99,7 @@ protected:
 
         SkImageInfo info = SkImageInfo::MakeN32(kWidth, kHeight, 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) {
             SkPaint paint;