Minor cleanup of StoreBuffer related heap iteration methods.

src/v8globals.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 239 matching lines @@
 
 struct CodeDesc {
   byte* buffer;
   int buffer_size;
   int instr_size;
   int reloc_size;
   Assembler* origin;
 };
 
 
-// Callback function on object slots, used for iterating heap object slots in
-// HeapObjects, global pointers to heap objects, etc. The callback allows the
-// callback function to change the value of the slot.
-typedef void (*ObjectSlotCallback)(HeapObject** pointer, HeapObject* object);
-
-
 // Callback function used for iterating objects in heap spaces,
 // for example, scanning heap objects.
 typedef int (*HeapObjectCallback)(HeapObject* obj);
 
 
 // Callback function used for checking constraints when copying/relocating
 // objects. Returns true if an object can be copied/relocated from its
 // old_addr to a new_addr.
 typedef bool (*ConstraintCallback)(Address new_addr, Address old_addr);
 
@@ skipping 243 matching lines @@
 // Used to specify whether a receiver is implicitly or explicitly
 // provided to a call.
 enum CallKind {
   CALL_AS_METHOD = 0,
   CALL_AS_FUNCTION
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_V8GLOBALS_H_