- Add an OSThread structure which is the generic TLS structure for all C++

runtime/vm/timeline_test.cc

Index: runtime/vm/timeline_test.cc
diff --git a/runtime/vm/timeline_test.cc b/runtime/vm/timeline_test.cc
index 00fc839045c09d57b3e3f4f19a891a8ccf1dda6b..2d9bb57097ef1462bab176e5bf960ac2394a023b 100644
--- a/runtime/vm/timeline_test.cc
+++ b/runtime/vm/timeline_test.cc
@@ -478,7 +478,9 @@ TEST_CASE(TimelinePauses_Basic) {
   ASSERT(recorder != NULL);
   Zone* zone = thread->zone();
   Isolate* isolate = thread->isolate();
-  ThreadId tid = OSThread::GetCurrentThreadTraceId();
+  OSThread* os_thread = thread->os_thread();
+  ASSERT(os_thread != NULL);
+  ThreadId tid = os_thread->trace_id();
 
   // Test case.
   TimelineTestHelper::FakeDuration(recorder, "a", 0, 10);
@@ -648,7 +650,9 @@ TEST_CASE(TimelinePauses_BeginEnd) {
   ASSERT(recorder != NULL);
   Zone* zone = thread->zone();
   Isolate* isolate = thread->isolate();
-  ThreadId tid = OSThread::GetCurrentThreadTraceId();
+  OSThread* os_thread = thread->os_thread();
+  ASSERT(os_thread != NULL);
+  ThreadId tid = os_thread->trace_id();
 
   // Test case.
   TimelineTestHelper::FakeBegin(recorder, "a", 0);