If we swap its arguments, SkTaskGroup::batch() _is_ sk_parallel_for.

tests/PathOpsSkpClipTest.cpp

Index: tests/PathOpsSkpClipTest.cpp
diff --git a/tests/PathOpsSkpClipTest.cpp b/tests/PathOpsSkpClipTest.cpp
index f82d75d036890303dd6a1432d800da2ee02eedff..e70e1c0c663dc76622bd8add3d9c522f9503fb81 100644
--- a/tests/PathOpsSkpClipTest.cpp
+++ b/tests/PathOpsSkpClipTest.cpp
@@ -307,7 +307,7 @@ TestRunner::~TestRunner() {
 void TestRunner::render() {
     // TODO: this doesn't really need to use SkRunnables any more.
     // We can just write the code to run in the for-loop directly.
-    sk_parallel_for(fRunnables.count(), [&](int i) {
+    SkTaskGroup().batch(fRunnables.count(), [&](int i) {
         fRunnables[i]->run();
     });
 }