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/GrPorterDuffTest.cpp b/tests/GrPorterDuffTest.cpp
index 608e5f2..a5ac868 100644
--- a/tests/GrPorterDuffTest.cpp
+++ b/tests/GrPorterDuffTest.cpp
@@ -29,7 +29,7 @@
 static void test_lcd_coverage_fallback_case(skiatest::Reporter* reporter, const GrCaps& caps);
 
 DEF_GPUTEST_FOR_NULLGL_CONTEXT(GrPorterDuff, reporter, ctxInfo) {
-    const GrCaps& caps = *ctxInfo.fGrContext->getGpu()->caps();
+    const GrCaps& caps = *ctxInfo.grContext()->getGpu()->caps();
     if (!caps.shaderCaps()->dualSourceBlendingSupport()) {
         SkFAIL("Null context does not support dual source blending.");
         return;