ART: SHARED_REQUIRES to REQUIRES_SHARED

This coincides with the actual attribute name and upstream usage.
Preparation for deferring to libbase.

Test: m
Test: m test-art-host
Change-Id: Ia8986b5dfd926ba772bf00b0a35eaf83596d8518
diff --git a/runtime/thread_list.h b/runtime/thread_list.h
index 49f65e1..5880085 100644
--- a/runtime/thread_list.h
+++ b/runtime/thread_list.h
@@ -142,11 +142,11 @@
                !Locks::thread_suspend_count_lock_);
 
   void VisitRoots(RootVisitor* visitor) const
-      SHARED_REQUIRES(Locks::mutator_lock_);
+      REQUIRES_SHARED(Locks::mutator_lock_);
 
   void VisitRootsForSuspendedThreads(RootVisitor* visitor)
       REQUIRES(!Locks::thread_list_lock_, !Locks::thread_suspend_count_lock_)
-      SHARED_REQUIRES(Locks::mutator_lock_);
+      REQUIRES_SHARED(Locks::mutator_lock_);
 
   // Return a copy of the thread list.
   std::list<Thread*> GetList() REQUIRES(Locks::thread_list_lock_) {