One signature for creating unit tests that run on premade GrContexts
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1860593002

Review URL: https://codereview.chromium.org/1860593002
diff --git a/tests/BlurTest.cpp b/tests/BlurTest.cpp
index 679701d..9b4bf4e 100644
--- a/tests/BlurTest.cpp
+++ b/tests/BlurTest.cpp
@@ -314,7 +314,7 @@
 }
 
 // Test out the normal blur style with a wide range of sigmas
-DEF_GPUTEST_FOR_RENDERING_CONTEXTS(BlurSigmaRange, reporter, context) {
+DEF_TEST(BlurSigmaRange, reporter) {
     static const int kSize = 100;
 
     // The geometry is offset a smidge to trigger:
@@ -556,10 +556,10 @@
 
 // This exercises the problem discovered in crbug.com/570232. The return value from
 // SkBlurMask::BoxBlur wasn't being checked in SkBlurMaskFilter.cpp::GrRRectBlurEffect::Create
-DEF_GPUTEST_FOR_RENDERING_CONTEXTS(SmallBoxBlurBug, reporter, ctx) {
+DEF_GPUTEST_FOR_RENDERING_CONTEXTS(SmallBoxBlurBug, reporter, ctxInfo) {
 
     SkImageInfo info = SkImageInfo::MakeN32Premul(128, 128);
-    auto surface(SkSurface::MakeRenderTarget(ctx, SkBudgeted::kNo, info));
+    auto surface(SkSurface::MakeRenderTarget(ctxInfo.fGrContext, SkBudgeted::kNo, info));
     SkCanvas* canvas = surface->getCanvas();
 
     SkRect r = SkRect::MakeXYWH(10, 10, 100, 100);