One signature for creating unit tests that run on premade GrContexts

tests/CopySurfaceTest.cpp

Index: tests/CopySurfaceTest.cpp
diff --git a/tests/CopySurfaceTest.cpp b/tests/CopySurfaceTest.cpp
index 3740f6e87c8d3b0dbad1e6c3b58c02ca0f74b146..af58bf9e5c73acef25ea52910aa92346bca1aa82 100644
--- a/tests/CopySurfaceTest.cpp
+++ b/tests/CopySurfaceTest.cpp
@@ -15,7 +15,8 @@
 
 #include "SkUtils.h"
 
-DEF_GPUTEST_FOR_RENDERING_CONTEXTS(CopySurface, reporter, context) {
+DEF_GPUTEST_FOR_RENDERING_CONTEXTS(CopySurface, reporter, ctxInfo) {
+    GrContext* context = ctxInfo.fGrContext;
     static const int kW = 10;
     static const int kH = 10;
     static const size_t kRowBytes = sizeof(uint32_t) * kW;