On Wed, Sep 21, 2011 at 12:05 PM, Alexey Proskuryakov <ap@webkit.org> wrote:

Anyway, I'm not sure if we already agreed that mouse lock is only desirable in full screen. I think that the spec has the goal of enabling it in browser windows.

Indeed, this is explicitly a use case we want to allow.  It's reasonable to want to play many mouse-lock-requiring games (Quake, Starcraft, etc.) in non-fullscreen mode, e.g. so one can still keep some other critical display open elsewhere on the screen.

PK