One signature for creating unit tests that run on premade GrContexts

tests/Test.h

Index: tests/Test.h
diff --git a/tests/Test.h b/tests/Test.h
index 7430372e7d9a3fb6586323faa1bb08d23d8fa335..de99fa53e030ce9d952d64915a5b1ba6d4a009cc 100644
--- a/tests/Test.h
+++ b/tests/Test.h
@@ -11,11 +11,16 @@
 #include "SkTRegistry.h"
 #include "SkTypes.h"
 
+#if SK_SUPPORT_GPU
+#include "GrContextFactory.h"
+#else
 namespace sk_gpu_test {
 class GrContextFactory;
+class ContextInfo;
 class GLTestContext;
 }  // namespace sk_gpu_test
 class GrContext;
+#endif
 
 namespace skiatest {
 
@@ -83,9 +88,11 @@ enum GPUTestContexts {
                                        | kNull_GPUTestContexts
                                        | kDebug_GPUTestContexts
 };
-template<typename T>
-void RunWithGPUTestContexts(T testFunction, GPUTestContexts contexts, Reporter* reporter,
-                            sk_gpu_test::GrContextFactory* factory);
+
+typedef void GrContextTestFn(Reporter*, const sk_gpu_test::ContextInfo&);
+
+void RunWithGPUTestContexts(GrContextTestFn* testFunction, GPUTestContexts contexts,
+                            Reporter* reporter, sk_gpu_test::GrContextFactory* factory);
 
 /** Timer provides wall-clock duration since its creation. */
 class Timer {
@@ -141,38 +148,32 @@ private:
             skiatest::Test(#name, false, test_##name));                           \
     void test_##name(skiatest::Reporter* reporter, sk_gpu_test::GrContextFactory*)
 
-#define GPUTEST_EXPAND_MSVC(x) x
-#define GPUTEST_APPLY(C, ...) GPUTEST_EXPAND_MSVC(C(__VA_ARGS__))
-#define GPUTEST_SELECT(a1, a2, N, ...) N
 
-#define GPUTEST_CONTEXT_ARGS1(a1) GrContext* a1
-#define GPUTEST_CONTEXT_ARGS2(a1, a2) GrContext* a1, sk_gpu_test::GLTestContext* a2
-#define GPUTEST_CONTEXT_ARGS(...)                                                            \
-    GPUTEST_APPLY(GPUTEST_SELECT(__VA_ARGS__, GPUTEST_CONTEXT_ARGS2, GPUTEST_CONTEXT_ARGS1), \
-                  __VA_ARGS__)
-
-#define DEF_GPUTEST(name, reporter, factory)                                      \
-    static void test_##name(skiatest::Reporter*, sk_gpu_test::GrContextFactory*); \
-    skiatest::TestRegistry name##TestRegistry(                                    \
-            skiatest::Test(#name, true, test_##name));                            \
+#define DEF_GPUTEST(name, reporter, factory)                                                 \
+    static void test_##name(skiatest::Reporter*, sk_gpu_test::GrContextFactory*);            \
+    skiatest::TestRegistry name##TestRegistry(                                               \
+            skiatest::Test(#name, true, test_##name));                                       \
     void test_##name(skiatest::Reporter* reporter, sk_gpu_test::GrContextFactory* factory)
 
-#define DEF_GPUTEST_FOR_CONTEXTS(name, contexts, reporter, ...)                      \
-    static void test_##name(skiatest::Reporter*, GPUTEST_CONTEXT_ARGS(__VA_ARGS__)); \
-    static void test_gpu_contexts_##name(skiatest::Reporter* reporter,               \
-                                         sk_gpu_test::GrContextFactory* factory) {   \
-        skiatest::RunWithGPUTestContexts(test_##name, contexts, reporter, factory);  \
-    }                                                                                \
-    skiatest::TestRegistry name##TestRegistry(                                       \
-            skiatest::Test(#name, true, test_gpu_contexts_##name));                  \
-    void test_##name(skiatest::Reporter* reporter, GPUTEST_CONTEXT_ARGS(__VA_ARGS__))
-
-#define DEF_GPUTEST_FOR_ALL_CONTEXTS(name, reporter, ...) \
-        DEF_GPUTEST_FOR_CONTEXTS(name, skiatest::kAll_GPUTestContexts, reporter, __VA_ARGS__)
-#define DEF_GPUTEST_FOR_RENDERING_CONTEXTS(name, reporter, ...) \
-        DEF_GPUTEST_FOR_CONTEXTS(name, skiatest::kAllRendering_GPUTestContexts, reporter, __VA_ARGS__)
-#define DEF_GPUTEST_FOR_NULL_CONTEXT(name, reporter, ...) \
-        DEF_GPUTEST_FOR_CONTEXTS(name, skiatest::kNull_GPUTestContexts, reporter, __VA_ARGS__)
+#define DEF_GPUTEST_FOR_CONTEXTS(name, contexts, reporter, context_info)            \
+    static void test_##name(skiatest::Reporter*,                                    \
+                            const sk_gpu_test::ContextInfo& context_info);          \
+    static void test_gpu_contexts_##name(skiatest::Reporter* reporter,              \
+                                         sk_gpu_test::GrContextFactory* factory) {  \
+        skiatest::RunWithGPUTestContexts(test_##name, contexts, reporter, factory); \
+    }                                                                               \
+    skiatest::TestRegistry name##TestRegistry(                                      \
+            skiatest::Test(#name, true, test_gpu_contexts_##name));                 \
+    void test_##name(skiatest::Reporter* reporter,                                  \
+                     const sk_gpu_test::ContextInfo& context_info)
+
+#define DEF_GPUTEST_FOR_ALL_CONTEXTS(name, reporter, context_info)                              \
+        DEF_GPUTEST_FOR_CONTEXTS(name, skiatest::kAll_GPUTestContexts, reporter, context_info)
+#define DEF_GPUTEST_FOR_RENDERING_CONTEXTS(name, reporter, context_info)                        \
+        DEF_GPUTEST_FOR_CONTEXTS(name, skiatest::kAllRendering_GPUTestContexts, reporter,       \
+                                 context_info)
+#define DEF_GPUTEST_FOR_NULL_CONTEXT(name, reporter, context_info)                              \
+        DEF_GPUTEST_FOR_CONTEXTS(name, skiatest::kNull_GPUTestContexts, reporter, context_info)
 
 #define REQUIRE_PDF_DOCUMENT(TEST_NAME, REPORTER)                             \
     do {                                                                      \