DevTools: Install local node.js for Mac

third_party/WebKit/Source/devtools/scripts/install_node_deps.py

 #!/usr/bin/env python
 #
 # Copyright 2016 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """
 Ensure node.js and npm modules are installed
 """
 
@@ skipping 19 matching lines @@
 
 
 def resolve_node_paths():
     if has_valid_global_node():
         return (which('node'), which('npm'))
     has_installed_local_node = path.isfile(local_node_binary_path)
     if has_installed_local_node:
         return (local_node_binary_path, local_npm_binary_path)
     if path.isdir(local_node_runtimes_path):
         shutil.rmtree(local_node_runtimes_path)
-    if sys.platform == 'linux2':
+    if sys.platform == 'linux2' or sys.platform == 'darwin':
         install_node()
         return (local_node_binary_path, local_npm_binary_path)
-    print('ERROR: Please install the latest node.js LTS version using the Mac or Windows installer:')
+    print('ERROR: Please install the latest node.js LTS version using the Windows installer:')
     print('https://nodejs.org/en/download/')
     raise
 
 
 def has_valid_global_node():
     node_path = which('node')
     if not node_path:
         return False
     node_process = popen([node_path, '--version'])
     (node_process_out, _) = node_process.communicate()
@@ skipping 43 matching lines @@
     return None
 
 
 def popen(arguments, env=None):
     return subprocess.Popen(
         arguments, stdout=subprocess.PIPE, stderr=subprocess.STDOUT, env=env)
 
 
 if __name__ == '__main__':
     sys.exit(main())