src: added context around the TODO change

Added more context around the TODO change required for achieving the
task. When destructuring the isolate and environment_vars from the
environment object, it is leading to recursive dependency and thus not
able to refactor it in a better way.

src/env.cc

@@ -368,7 +368,8 @@ Environment::Environment(IsolateData* isolate_data,
 
   set_env_vars(per_process::system_environment);
   // TODO(joyeecheung): pass Isolate* and env_vars to it instead of the entire
-  // env
+  // env, when the recursive dependency inclusion in "debug-utils.h" is
+  // resolved.
   enabled_debug_list_.Parse(this);
 
   // We create new copies of the per-Environment option sets, so that it is