The web plugin has been broken for some time on OSX. Here's how you can fix:
Copy the files in the folder: /Library/Internet Plug-Ins/VLC Plugin.plugin/Contents/MacOS/lib/
to this new folder: /Users/videolan/slave/vlc-npapi-osx-ub/build/extras/macosx/vlc/x86_64-install/lib/
and restart Chrome.
Hopefully the plugin will be updated with the correct paths soon.