Make existing unit tests only run on GL contexts

tests/GrTextureMipMapInvalidationTest.cpp

Index: tests/GrTextureMipMapInvalidationTest.cpp
diff --git a/tests/GrTextureMipMapInvalidationTest.cpp b/tests/GrTextureMipMapInvalidationTest.cpp
index 0a8ecb6cbcac8bd0119ef54923b9ec10c3727008..523bb82aaeac77205e55bf6e9026726c9550d9c0 100644
--- a/tests/GrTextureMipMapInvalidationTest.cpp
+++ b/tests/GrTextureMipMapInvalidationTest.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_NULL_CONTEXT(GrTextureMipMapInvalidationTest, reporter, ctxInfo) {
+DEF_GPUTEST_FOR_NULLGL_CONTEXT(GrTextureMipMapInvalidationTest, reporter, ctxInfo) {
     GrContext* context = ctxInfo.fGrContext;
     GrSurfaceDesc desc;
     desc.fConfig = kSkia8888_GrPixelConfig;