process: keep process prototype in inheritance chain

The global `process` object had its prototype replaced with a
fresh object that had `EventEmitter.prototype` as its prototype.
With this change, the original `process.constructor.prototype` is
modified to have `EventEmitter.prototype` as its prototype, reflecting
that `process` objects are also `EventEmitter`s.

Fixes: #14699
PR-URL: #14715
Reviewed-By: Anna Henningsen <anna@addaleax.net>

lib/internal/bootstrap_node.js

@@ -14,9 +14,7 @@
     process._eventsCount = 0;
 
     const origProcProto = Object.getPrototypeOf(process);
-    Object.setPrototypeOf(process, Object.create(EventEmitter.prototype, {
-      constructor: Object.getOwnPropertyDescriptor(origProcProto, 'constructor')
-    }));
+    Object.setPrototypeOf(origProcProto, EventEmitter.prototype);
 
     EventEmitter.call(process);
 

test/parallel/test-process-prototype.js

@@ -5,6 +5,7 @@ const EventEmitter = require('events');
 
 const proto = Object.getPrototypeOf(process);
 
+assert(process instanceof process.constructor);
 assert(proto instanceof EventEmitter);
 
 const desc = Object.getOwnPropertyDescriptor(proto, 'constructor');