Opening google-chrome-stable from the menu does nothing except for a slight twitch of the icon. Running
google-chrome-stable via the terminal does produce some interesting output, though.
$ google-chrome-stable [31450:31450:0315/120013:ERROR:process_singleton_posix.cc(277)] Failed to create /home/marshall/.config/google-chrome/SingletonLock: File exists [31450:31450:0315/120013:ERROR:chrome_browser_main.cc(1209)] Failed to create a ProcessSingleton for your profile directory. This means that running multiple instances would start multiple browser processes rather than opening a new window in the existing process. Aborting now to avoid profile corruption.