node: --no-browser-globals configure flag

Introduce `--no-browser-globals` configure flag. With this flag set, following
globals won't be exported:

- `setTimeout`, `clearTimeout`, `setInterval`, `clearInterval`,
  `setImmediate`, `clearImmediate`
- `console`

These are provided by the DOM implementation in browser, so the
`--no-browser-globals` flag may be helpful when embedding node.js within
chromium/webkit.

Inspired-By: atom/node@82e10ce
PR-URL: #5853
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Rod Vagg <rod@vagg.org>

configure

@@ -373,6 +373,12 @@ parser.add_option('--enable-static',
     dest='enable_static',
     help='build as static library')
 
+parser.add_option('--no-browser-globals',
+    action='store_true',
+    dest='no_browser_globals',
+    help='do not export browser globals like setTimeout, console, etc. ' +
+         '(This mode is not officially supported for regular applications)')
+
 (options, args) = parser.parse_args()
 
 # Expand ~ in the install prefix now, it gets written to multiple files.
@@ -762,6 +768,8 @@ def configure_node(o):
   if options.enable_static:
     o['variables']['node_target_type'] = 'static_library'
 
+  o['variables']['node_no_browser_globals'] = b(options.no_browser_globals)
+
   if options.linked_module:
     o['variables']['library_files'] = options.linked_module
 

lib/internal/bootstrap_node.js

@@ -40,8 +40,10 @@
     setupProcessFatal();
 
     setupGlobalVariables();
-    setupGlobalTimeouts();
-    setupGlobalConsole();
+    if (!process._noBrowserGlobals) {
+      setupGlobalTimeouts();
+      setupGlobalConsole();
+    }
 
     const _process = NativeModule.require('internal/process');
 

node.gyp

@@ -5,6 +5,7 @@
     'node_use_lttng%': 'false',
     'node_use_etw%': 'false',
     'node_use_perfctr%': 'false',
+    'node_no_browser_globals%': 'false',
     'node_has_winsdk%': 'false',
     'node_shared_zlib%': 'false',
     'node_shared_http_parser%': 'false',
@@ -367,6 +368,9 @@
             'tools/msvs/genfiles/node_perfctr_provider.rc',
           ]
         } ],
+        [ 'node_no_browser_globals=="true"', {
+          'defines': [ 'NODE_NO_BROWSER_GLOBALS' ],
+        } ],
         [ 'v8_postmortem_support=="true"', {
           'dependencies': [ 'deps/v8/tools/gyp/v8.gyp:postmortem-metadata' ],
           'conditions': [

src/node.cc

@@ -3070,6 +3070,11 @@ void SetupProcessObject(Environment* env,
     READONLY_PROPERTY(process, "throwDeprecation", True(env->isolate()));
   }
 
+#ifdef NODE_NO_BROWSER_GLOBALS
+  // configure --no-browser-globals
+  READONLY_PROPERTY(process, "_noBrowserGlobals", True(env->isolate()));
+#endif  // NODE_NO_BROWSER_GLOBALS
+
   // --prof-process
   if (prof_process) {
     READONLY_PROPERTY(process, "profProcess", True(env->isolate()));