Turn ContextInfos returned by GrContextFactory into structs.

tests/GrSurfaceTest.cpp

Index: tests/GrSurfaceTest.cpp
diff --git a/tests/GrSurfaceTest.cpp b/tests/GrSurfaceTest.cpp
index a7b64b7c9f2f37bea5e0d9cddbf3a83352570c18..e61b934a71fc8d790ca9cfd34232bcf7ba249e88 100644
--- a/tests/GrSurfaceTest.cpp
+++ b/tests/GrSurfaceTest.cpp
@@ -19,7 +19,7 @@
 // Tests that GrSurface::asTexture(), GrSurface::asRenderTarget(), and static upcasting of texture
 // and render targets to GrSurface all work as expected.
 DEF_GPUTEST_FOR_NULLGL_CONTEXT(GrSurface, reporter, ctxInfo) {
-    GrContext* context = ctxInfo.fGrContext;
+    GrContext* context = ctxInfo.grContext();
     GrSurfaceDesc desc;
     desc.fConfig = kSkia8888_GrPixelConfig;
     desc.fFlags = kRenderTarget_GrSurfaceFlag;