Perform TODO(gc) cleanup for TODO-lockdown.

src/mark-compact.h

 // Copyright 2011 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 634 matching lines @@
   // Phase 2: Sweeping to clear mark bits and free non-live objects for
   // a non-compacting collection.
   //
   //  Before: Live objects are marked and non-live objects are unmarked.
   //
   //   After: Live objects are unmarked, non-live regions have been added to
   //          their space's free list. Active eden semispace is compacted by
   //          evacuation.
   //
 
-
-  // Iterates live objects in a space, passes live objects
-  // to a callback function which returns the heap size of the object.
-  // Returns the number of live objects iterated.
-  int IterateLiveObjects(NewSpace* space, LiveObjectCallback size_f);
-  int IterateLiveObjects(PagedSpace* space, LiveObjectCallback size_f);
-
-  // Iterates the live objects between a range of addresses, returning the
-  // number of live objects.
-  int IterateLiveObjectsInRange(Address start, Address end,
-                                LiveObjectCallback size_func);
-
   // If we are not compacting the heap, we simply sweep the spaces except
   // for the large object space, clearing mark bits and adding unmarked
   // regions to each space's free list.
   void SweepSpaces();
 
   void EvacuateNewSpace();
 
   void EvacuateLiveObjectsFromPage(Page* p);
 
   void EvacuatePages();
@@ skipping 47 matching lines @@
 
   List<Page*> evacuation_candidates_;
 
   friend class Heap;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_MARK_COMPACT_H_