Turn ContextInfos returned by GrContextFactory into structs.
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1966013002

Review-Url: https://codereview.chromium.org/1966013002
diff --git a/tests/PremulAlphaRoundTripTest.cpp b/tests/PremulAlphaRoundTripTest.cpp
index 14ab721..575e776 100644
--- a/tests/PremulAlphaRoundTripTest.cpp
+++ b/tests/PremulAlphaRoundTripTest.cpp
@@ -108,7 +108,7 @@
 DEF_GPUTEST_FOR_RENDERING_CONTEXTS(PremulAlphaRoundTrip_Gpu, reporter, ctxInfo) {
     const SkImageInfo info = SkImageInfo::MakeN32Premul(256, 256);
 
-    sk_sp<SkSurface> surf(SkSurface::MakeRenderTarget(ctxInfo.fGrContext,
+    sk_sp<SkSurface> surf(SkSurface::MakeRenderTarget(ctxInfo.grContext(),
                                                       SkBudgeted::kNo,
                                                       info));
     test_premul_alpha_roundtrip(reporter, surf.get());