Change return value of ObjectStore::PreallocateObjects to return the error object or null instead o…

runtime/vm/object_store.h

Index: runtime/vm/object_store.h
diff --git a/runtime/vm/object_store.h b/runtime/vm/object_store.h
index 2cab02ba46bdd3093ab4afb09cc572a87c91c54b..92be955561599b0c55c3689fe4305c23b3f32d5f 100644
--- a/runtime/vm/object_store.h
+++ b/runtime/vm/object_store.h
@@ -478,9 +478,9 @@ class ObjectStore {
   void VisitObjectPointers(ObjectPointerVisitor* visitor);
 
   // Called to initialize objects required by the vm but which invoke
-  // dart code.  If an error occurs then false is returned and error
-  // information is stored in Thread::sticky_error().
-  bool PreallocateObjects();
+  // dart code.  If an error occurs the error object is returned otherwise
+  // a null object is returned.
+  RawError* PreallocateObjects();
 
   void InitKnownObjects();