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/RectangleTextureTest.cpp b/tests/RectangleTextureTest.cpp
index 8c3bdd6..2fa51e2 100644
--- a/tests/RectangleTextureTest.cpp
+++ b/tests/RectangleTextureTest.cpp
@@ -139,8 +139,8 @@
 }
 
 DEF_GPUTEST_FOR_GL_RENDERING_CONTEXTS(RectangleTexture, reporter, ctxInfo) {
-    GrContext* context = ctxInfo.fGrContext;
-    sk_gpu_test::GLTestContext* glContext = ctxInfo.fGLContext;
+    GrContext* context = ctxInfo.grContext();
+    sk_gpu_test::GLTestContext* glContext = ctxInfo.glContext();
     static const int kWidth = 13;
     static const int kHeight = 13;