bootstrap: consolidate global properties definition

`globalThis.process` and `globalThis.Buffer` has been re-defined with
a getter/setter pair.

`atob` and `bota` are defined as enumerable properties according to
WebIDL definition.

PR-URL: https://github.com/nodejs/node/pull/43357
Refs: https://github.com/nodejs/node/pull/26882
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>

lib/internal/bootstrap/browser.js

@@ -65,6 +65,13 @@ defineOperation(globalThis, 'clearTimeout', timers.clearTimeout);
 defineOperation(globalThis, 'setInterval', timers.setInterval);
 defineOperation(globalThis, 'setTimeout', timers.setTimeout);
 
+const buffer = require('buffer');
+defineOperation(globalThis, 'atob', buffer.atob);
+defineOperation(globalThis, 'btoa', buffer.btoa);
+
+// https://www.w3.org/TR/FileAPI/#dfn-Blob
+exposeInterface(globalThis, 'Blob', buffer.Blob);
+
 // https://www.w3.org/TR/hr-time-2/#the-performance-attribute
 defineReplacableAttribute(globalThis, 'performance',
                           require('perf_hooks').performance);

lib/internal/bootstrap/node.js

@@ -45,7 +45,6 @@ const {
   FunctionPrototypeCall,
   JSONParse,
   ObjectDefineProperty,
-  ObjectDefineProperties,
   ObjectGetPrototypeOf,
   ObjectPreventExtensions,
   ObjectSetPrototypeOf,
@@ -377,13 +376,21 @@ function setupProcessObject() {
     configurable: false,
     value: 'process'
   });
-  // Make process globally available to users by putting it on the global proxy
+
+  // Create global.process as getters so that we have a
+  // deprecation path for these in ES Modules.
+  // See https://github.com/nodejs/node/pull/26334.
+  let _process = process;
   ObjectDefineProperty(globalThis, 'process', {
     __proto__: null,
-    value: process,
+    get() {
+      return _process;
+    },
+    set(value) {
+      _process = value;
+    },
     enumerable: false,
-    writable: true,
-    configurable: true
+    configurable: true,
   });
 }
 
@@ -399,10 +406,7 @@ function setupGlobalProxy() {
 
 function setupBuffer() {
   const {
-    Blob,
     Buffer,
-    atob,
-    btoa,
   } = require('buffer');
   const bufferBinding = internalBinding('buffer');
 
@@ -411,34 +415,19 @@ function setupBuffer() {
   delete bufferBinding.setBufferPrototype;
   delete bufferBinding.zeroFill;
 
-  ObjectDefineProperties(globalThis, {
-    'Blob': {
-      __proto__: null,
-      value: Blob,
-      enumerable: false,
-      writable: true,
-      configurable: true,
+  // Create global.Buffer as getters so that we have a
+  // deprecation path for these in ES Modules.
+  // See https://github.com/nodejs/node/pull/26334.
+  let _Buffer = Buffer;
+  ObjectDefineProperty(globalThis, 'Buffer', {
+    __proto__: null,
+    get() {
+      return _Buffer;
     },
-    'Buffer': {
-      __proto__: null,
-      value: Buffer,
-      enumerable: false,
-      writable: true,
-      configurable: true,
-    },
-    'atob': {
-      __proto__: null,
-      value: atob,
-      enumerable: false,
-      writable: true,
-      configurable: true,
-    },
-    'btoa': {
-      __proto__: null,
-      value: btoa,
-      enumerable: false,
-      writable: true,
-      configurable: true,
+    set(value) {
+      _Buffer = value;
     },
+    enumerable: false,
+    configurable: true,
   });
 }

lib/internal/bootstrap/pre_execution.js

@@ -23,7 +23,6 @@ const {
   exposeInterface,
 } = require('internal/util');
 
-const { Buffer } = require('buffer');
 const {
   ERR_MANIFEST_ASSERT_INTEGRITY,
 } = require('internal/errors').codes;
@@ -408,35 +407,6 @@ function initializeDeprecations() {
                                       'process._tickCallback() is deprecated',
                                       'DEP0134');
   }
-
-  // Create global.process and global.Buffer as getters so that we have a
-  // deprecation path for these in ES Modules.
-  // See https://github.com/nodejs/node/pull/26334.
-  let _process = process;
-  ObjectDefineProperty(globalThis, 'process', {
-    __proto__: null,
-    get() {
-      return _process;
-    },
-    set(value) {
-      _process = value;
-    },
-    enumerable: false,
-    configurable: true
-  });
-
-  let _Buffer = Buffer;
-  ObjectDefineProperty(globalThis, 'Buffer', {
-    __proto__: null,
-    get() {
-      return _Buffer;
-    },
-    set(value) {
-      _Buffer = value;
-    },
-    enumerable: false,
-    configurable: true
-  });
 }
 
 function setupChildProcessIpcChannel() {

test/parallel/test-global.js

@@ -49,6 +49,8 @@ builtinModules.forEach((moduleName) => {
     'clearImmediate',
     'clearInterval',
     'clearTimeout',
+    'atob',
+    'btoa',
     'performance',
     'setImmediate',
     'setInterval',