Add ENABLE_DEBUGGER_SUPPORT macro....

src/heap.cc

 // Copyright 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 2661 matching lines @@
   v->VisitPointer(bit_cast<Object**, String**>(&name##_));
   SYMBOL_LIST(SYMBOL_ITERATE)
 #undef SYMBOL_ITERATE
   v->VisitPointer(bit_cast<Object**, String**>(&hidden_symbol_));
   SYNCHRONIZE_TAG("symbol");
 
   Bootstrapper::Iterate(v);
   SYNCHRONIZE_TAG("bootstrapper");
   Top::Iterate(v);
   SYNCHRONIZE_TAG("top");
+
+#ifdef ENABLE_DEBUGGER_SUPPORT
   Debug::Iterate(v);
+#endif
   SYNCHRONIZE_TAG("debug");
   CompilationCache::Iterate(v);
   SYNCHRONIZE_TAG("compilationcache");
 
   // Iterate over local handles in handle scopes.
   HandleScopeImplementer::Iterate(v);
   SYNCHRONIZE_TAG("handlescope");
 
   // Iterate over the builtin code objects and code stubs in the heap. Note
   // that it is not strictly necessary to iterate over code objects on
@@ skipping 691 matching lines @@
 #ifdef DEBUG
 bool Heap::GarbageCollectionGreedyCheck() {
   ASSERT(FLAG_gc_greedy);
   if (Bootstrapper::IsActive()) return true;
   if (disallow_allocation_failure()) return true;
   return CollectGarbage(0, NEW_SPACE);
 }
 #endif
 
 } }  // namespace v8::internal