Fix mac os x build.t

runtime/bin/file_system_watcher_macos.cc

Index: runtime/bin/file_system_watcher_macos.cc
diff --git a/runtime/bin/file_system_watcher_macos.cc b/runtime/bin/file_system_watcher_macos.cc
index afc112719b2f86027bd067d1156a5fe576ba953e..d06e2d79491c53c5c5b209e708cfe2c7efde5ece 100644
--- a/runtime/bin/file_system_watcher_macos.cc
+++ b/runtime/bin/file_system_watcher_macos.cc
@@ -98,7 +98,7 @@ class FSEventsWatcher {
     static void StartCallback(CFRunLoopTimerRef timer, void* info) {
       Node* node = reinterpret_cast<Node*>(info);
       ASSERT(Thread::Compare(node->watcher_->threadId_,
-                             Thread::GetCurrentThreadId());
+                             Thread::GetCurrentThreadId()));
       FSEventStreamContext context;
       memset(&context, 0, sizeof(context));
       context.info = reinterpret_cast<void*>(node);
@@ -150,7 +150,7 @@ class FSEventsWatcher {
     static void StopCallback(CFRunLoopTimerRef timer, void* info) {
       Node* node = reinterpret_cast<Node*>(info);
       ASSERT(Thread::Compare(node->watcher_->threadId_,
-                             Thread::GetCurrentThreadId());
+                             Thread::GetCurrentThreadId()));
       FSEventStreamStop(node->ref_);
       FSEventStreamInvalidate(node->ref_);
       FSEventStreamRelease(node->ref_);
@@ -243,7 +243,7 @@ class FSEventsWatcher {
   static void StopCallback(CFRunLoopTimerRef timer, void* info) {
     FSEventsWatcher* watcher = reinterpret_cast<FSEventsWatcher*>(info);
     ASSERT(Thread::Compare(node->watcher_->threadId_,
-                           Thread::GetCurrentThreadId());
+                           Thread::GetCurrentThreadId()));
     CFRunLoopStop(watcher->run_loop_);
   }
 
@@ -280,7 +280,7 @@ class FSEventsWatcher {
                        const FSEventStreamEventId event_ids[]) {
     Node* node = reinterpret_cast<Node*>(client);
     ASSERT(Thread::Compare(node->watcher_->threadId_,
-                           Thread::GetCurrentThreadId());
+                           Thread::GetCurrentThreadId()));
     // `ready` is set on same thread as this callback is invoked, so we don't
     // need to lock here.
     if (!node->ready()) return;