DevTools: Install local node.js for Mac

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

Index: third_party/WebKit/Source/devtools/scripts/install_node_deps.py
diff --git a/third_party/WebKit/Source/devtools/scripts/install_node_deps.py b/third_party/WebKit/Source/devtools/scripts/install_node_deps.py
index eacd18d04f9f0081f0ca70c9882471d08f967a3c..ab8eeab8c9f89e1d0faf59c9c7fd6fa767d9d20c 100755
--- a/third_party/WebKit/Source/devtools/scripts/install_node_deps.py
+++ b/third_party/WebKit/Source/devtools/scripts/install_node_deps.py
@@ -37,10 +37,10 @@ def resolve_node_paths():
         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