Always include debugger support.

src/heap-snapshot-generator.cc

 // Copyright 2013 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 2133 matching lines @@
             child_entry);
       }
     }
 
     // Add a shortcut to JS global object reference at snapshot root.
     if (child_obj->IsNativeContext()) {
       Context* context = Context::cast(child_obj);
       GlobalObject* global = context->global_object();
       if (global->IsJSGlobalObject()) {
         bool is_debug_object = false;
-#ifdef ENABLE_DEBUGGER_SUPPORT
         is_debug_object = heap_->isolate()->debug()->IsDebugGlobal(global);
-#endif
         if (!is_debug_object && !user_roots_.Contains(global)) {
           user_roots_.Insert(global);
           SetUserGlobalReference(global);
         }
       }
     }
   }
 }
 
 
@@ skipping 995 matching lines @@
   writer_->AddString("\"<dummy>\"");
   for (int i = 1; i < sorted_strings.length(); ++i) {
     writer_->AddCharacter(',');
     SerializeString(sorted_strings[i]);
     if (writer_->aborted()) return;
   }
 }
 
 
 } }  // namespace v8::internal