TaskScheduler: Add internal::GetTaskPriorityForCurrentThread().

base/task_scheduler/task_priority_for_current_thread_unittest.cc

Index: base/task_scheduler/task_priority_for_current_thread_unittest.cc
diff --git a/base/task_scheduler/task_priority_for_current_thread_unittest.cc b/base/task_scheduler/task_priority_for_current_thread_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..5fab42dc51b840796c5672b2c8109625d45a4304
--- /dev/null
+++ b/base/task_scheduler/task_priority_for_current_thread_unittest.cc
@@ -0,0 +1,25 @@
+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/task_scheduler/task_priority_for_current_thread.h"
+
+#include "base/task_scheduler/task_traits.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace base {
+namespace internal {
+
+TEST(TaskSchedulerTaskPriorityForCurrentThreadTest,
+     TaskPriorityForCurrentThread) {
+  EXPECT_EQ(TaskPriority::USER_VISIBLE, GetTaskPriorityForCurrentThread());
+  {
+    ScopedSetTaskPriorityForCurrentThread
+        scoped_set_task_traits_for_current_thread(TaskPriority::USER_BLOCKING);
+    EXPECT_EQ(TaskPriority::USER_BLOCKING, GetTaskPriorityForCurrentThread());
+  }
+  EXPECT_EQ(TaskPriority::USER_VISIBLE, GetTaskPriorityForCurrentThread());
+}
+
+}  // namespace internal
+}  // namespace base