Do not inherit TaskPriority in TaskTraits.

base/task_scheduler/test_utils.h

Index: base/task_scheduler/test_utils.h
diff --git a/base/task_scheduler/test_utils.h b/base/task_scheduler/test_utils.h
index dbd1227f52b14e82e43332437ce11311e29d4b7c..7c1514c5c39bd1276f253549b5898840e03a21dd 100644
--- a/base/task_scheduler/test_utils.h
+++ b/base/task_scheduler/test_utils.h
@@ -5,6 +5,8 @@
 #ifndef BASE_TASK_SCHEDULER_TEST_UTILS_H_
 #define BASE_TASK_SCHEDULER_TEST_UTILS_H_
 
+#include "base/task_scheduler/task_traits.h"
+
 namespace base {
 namespace internal {
 namespace test {
@@ -13,6 +15,10 @@ namespace test {
 // parametrize relevant task_scheduler tests.
 enum class ExecutionMode { PARALLEL, SEQUENCED, SINGLE_THREADED };
 
+// Returns TaskTraits with a non-INHERITED priority. This is useful because it
+// is invalid to initialize a Task with TaskTraits whose priority is INHERITED.
+TaskTraits CreateTaskTraits();
+
 }  // namespace test
 }  // namespace internal
 }  // namespace base