Don't overload FreeListElement for become.

runtime/vm/service.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/service.h"
 
 #include "include/dart_api.h"
 #include "include/dart_native_api.h"
 #include "platform/globals.h"
 
@@ skipping 2199 matching lines @@
 }
 
 
 class GetInstancesVisitor : public ObjectGraph::Visitor {
  public:
   GetInstancesVisitor(const Class& cls, const Array& storage)
       : cls_(cls), storage_(storage), count_(0) {}
 
   virtual Direction VisitObject(ObjectGraph::StackIterator* it) {
     RawObject* raw_obj = it->Get();
-    if (raw_obj->IsFreeListElement()) {
+    if (raw_obj->IsPseudoObject()) {
       return kProceed;
     }
     Thread* thread = Thread::Current();
     REUSABLE_OBJECT_HANDLESCOPE(thread);
     Object& obj = thread->ObjectHandle();
     obj = raw_obj;
     if (obj.GetClassId() == cls_.id()) {
       if (!storage_.IsNull() && count_ < storage_.Length()) {
         storage_.SetAt(count_, obj);
       }
@@ skipping 1103 matching lines @@
 
 
 class ContainsAddressVisitor : public FindObjectVisitor {
  public:
   explicit ContainsAddressVisitor(uword addr) : addr_(addr) { }
   virtual ~ContainsAddressVisitor() { }
 
   virtual uword filter_addr() const { return addr_; }
 
   virtual bool FindObject(RawObject* obj) const {
-    // Free list elements are not real objects, so skip them.
-    if (obj->IsFreeListElement()) {
+    if (obj->IsPseudoObject()) {
       return false;
     }
     uword obj_begin = RawObject::ToAddr(obj);
     uword obj_end = obj_begin + obj->Size();
     return obj_begin <= addr_ && addr_ < obj_end;
   }
  private:
   uword addr_;
 };
 
@@ skipping 686 matching lines @@
     if (strcmp(method_name, method.name) == 0) {
       return &method;
     }
   }
   return NULL;
 }
 
 #endif  // !PRODUCT
 
 }  // namespace dart