One signature for creating unit tests that run on premade GrContexts

tests/SpecialImageTest.cpp

Index: tests/SpecialImageTest.cpp
diff --git a/tests/SpecialImageTest.cpp b/tests/SpecialImageTest.cpp
index 770810a1c8c9d7e53187cc5a73355dcf408e4ce7..f16f5ff84c26c5d7eba653d0fe4e6d051a901c29 100644
--- a/tests/SpecialImageTest.cpp
+++ b/tests/SpecialImageTest.cpp
@@ -203,7 +203,8 @@ static void test_texture_backed(skiatest::Reporter* reporter,
 }
 
 // Test out the SkSpecialImage::makeTextureImage entry point
-DEF_GPUTEST_FOR_RENDERING_CONTEXTS(SpecialImage_MakeTexture, reporter, context) {
+DEF_GPUTEST_FOR_RENDERING_CONTEXTS(SpecialImage_MakeTexture, reporter, ctxInfo) {
+    GrContext* context = ctxInfo.fGrContext;
     SkBitmap bm = create_bm();
 
     const SkIRect& subset = SkIRect::MakeXYWH(kPad, kPad, kSmallerSize, kSmallerSize);
@@ -266,7 +267,8 @@ DEF_GPUTEST_FOR_RENDERING_CONTEXTS(SpecialImage_MakeTexture, reporter, context)
     }
 }
 
-DEF_GPUTEST_FOR_RENDERING_CONTEXTS(SpecialImage_Gpu, reporter, context) {
+DEF_GPUTEST_FOR_RENDERING_CONTEXTS(SpecialImage_Gpu, reporter, ctxInfo) {
+    GrContext* context = ctxInfo.fGrContext;
     SkBitmap bm = create_bm();
 
     GrSurfaceDesc desc;