For someone who uses the Ctrl-W bindings in vim habitually, it is incredibly annoying to have Chrome OS ask me, "Wanna close this window, then?"
How do I remap keys in Chrome OS? Can't find this top secret setting anywhere.
It is not currently possible.
Discussion thread: https://groups.google.com/a/chromium.org/d/msg/chromium-discuss/pfAQrN0-t6c/ADp_Io32DNAJ