Merge 6168:6800 from bleeding_edge to experimental/gc branch.

src/objects-visiting.h

 // Copyright 2006-2009 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 128 matching lines @@
 
 
 template<typename Callback>
 class VisitorDispatchTable {
  public:
   inline Callback GetVisitor(Map* map) {
     return callbacks_[map->visitor_id()];
   }
 
   void Register(StaticVisitorBase::VisitorId id, Callback callback) {
-    ASSERT((0 <= id) && (id < StaticVisitorBase::kVisitorIdCount));
+    ASSERT(id < StaticVisitorBase::kVisitorIdCount);  // id is unsigned.
     callbacks_[id] = callback;
   }
 
   template<typename Visitor,
            StaticVisitorBase::VisitorId base,
            StaticVisitorBase::VisitorId generic,
            int object_size_in_words>
   void RegisterSpecialization() {
     static const int size = object_size_in_words * kPointerSize;
     Register(StaticVisitorBase::GetVisitorIdForSize(base, generic, size),
@@ skipping 232 matching lines @@
 
   for (; !it.done(); it.next()) {
     it.rinfo()->template Visit<StaticVisitor>();
   }
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_VISITING_H_