base: Implement GetCurrentThreadPriority.

base/threading/platform_thread_unittest.cc

Index: base/threading/platform_thread_unittest.cc
diff --git a/base/threading/platform_thread_unittest.cc b/base/threading/platform_thread_unittest.cc
index 1c68dedbdf058e5a17efc55728c2483460fd7e42..673877556a1f0550415be3db522715073b613855 100644
--- a/base/threading/platform_thread_unittest.cc
+++ b/base/threading/platform_thread_unittest.cc
@@ -239,16 +239,9 @@ class ThreadPriorityTestThread : public FunctionTestThread {
 
 }  // namespace
 
-#if defined(OS_MACOSX)
-// PlatformThread::GetCurrentThreadPriority() is not implemented on OS X.
-#define MAYBE_ThreadPriorityCurrentThread DISABLED_ThreadPriorityCurrentThread
-#else
-#define MAYBE_ThreadPriorityCurrentThread ThreadPriorityCurrentThread
-#endif
-
 // Test changing a created thread's priority (which has different semantics on
 // some platforms).
-TEST(PlatformThreadTest, MAYBE_ThreadPriorityCurrentThread) {
+TEST(PlatformThreadTest, ThreadPriorityCurrentThread) {
   const bool bumping_priority_allowed = IsBumpingPriorityAllowed();
   if (bumping_priority_allowed) {
     // Bump the priority in order to verify that new threads are started with