Do not inherit TaskPriority in TaskTraits.

base/task_scheduler/task_tracker_posix_unittest.cc

Index: base/task_scheduler/task_tracker_posix_unittest.cc
diff --git a/base/task_scheduler/task_tracker_posix_unittest.cc b/base/task_scheduler/task_tracker_posix_unittest.cc
index a6edc69863504d61d7b862905ea92af296abe27a..ea54a07dcc57bba0172322581c7f3dc22546e5ee 100644
--- a/base/task_scheduler/task_tracker_posix_unittest.cc
+++ b/base/task_scheduler/task_tracker_posix_unittest.cc
@@ -17,6 +17,7 @@
 #include "base/sequence_token.h"
 #include "base/task_scheduler/task.h"
 #include "base/task_scheduler/task_traits.h"
+#include "base/task_scheduler/test_utils.h"
 #include "base/time/time.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ -30,7 +31,7 @@ TEST(TaskSchedulerTaskTrackerPosixTest, RunTask) {
   auto task = MakeUnique<Task>(
       FROM_HERE,
       Bind([](bool* did_run) { *did_run = true; }, Unretained(&did_run)),
-      TaskTraits(), TimeDelta());
+      test::CreateTaskTraits(), TimeDelta());
   TaskTrackerPosix tracker;
   tracker.set_watch_file_descriptor_message_loop(&message_loop);
 
@@ -45,10 +46,11 @@ TEST(TaskSchedulerTaskTrackerPosixTest, FileDescriptorWatcher) {
   MessageLoopForIO message_loop;
   int fds[2];
   ASSERT_EQ(0, pipe(fds));
-  auto task = MakeUnique<Task>(
-      FROM_HERE, Bind(IgnoreResult(&FileDescriptorWatcher::WatchReadable),
-                      fds[0], Bind(&DoNothing)),
-      TaskTraits(), TimeDelta());
+  auto task =
+      MakeUnique<Task>(FROM_HERE,
+                       Bind(IgnoreResult(&FileDescriptorWatcher::WatchReadable),
+                            fds[0], Bind(&DoNothing)),
+                       test::CreateTaskTraits(), TimeDelta());
   TaskTrackerPosix tracker;
   tracker.set_watch_file_descriptor_message_loop(&message_loop);