Code cleanup & simplification....

src/mark-compact.h

 // Copyright 2006-2008 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 134 matching lines @@
 
   friend class RootMarkingVisitor;
   friend class MarkingVisitor;
 
   // Marking operations for objects reachable from roots.
   static void MarkLiveObjects();
 
   static void MarkUnmarkedObject(HeapObject* obj);
 
   static inline void MarkObject(HeapObject* obj) {
-     if (!obj->IsMarked()) MarkUnmarkedObject(obj);
+    if (!obj->IsMarked()) MarkUnmarkedObject(obj);
+  }
+
+  static inline void SetMark(HeapObject* obj) {
+    tracer_->increment_marked_count();
+#ifdef DEBUG
+    UpdateLiveObjectCount(obj);
+#endif
+    obj->SetMark();
   }
 
   // Creates back pointers for all map transitions, stores them in
   // the prototype field.  The original prototype pointers are restored
   // in ClearNonLiveTransitions().  All JSObject maps
   // connected by map transitions have the same prototype object, which
   // is why we can use this field temporarily for back pointers.
   static void CreateBackPointers();
 
   // Mark a Map and its DescriptorArray together, skipping transitions.
@@ skipping 208 matching lines @@
 
   friend class UnmarkObjectVisitor;
   static void UnmarkObject(HeapObject* obj);
 #endif
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_MARK_COMPACT_H_