It's what linux distributions have been doing by default — just replacing it with a symlink to the system's installation of ffmpeg. The sane ones take the added step of not crippling their default ffmpeg :)
Unlike Firefox, Chrome extensions are sandboxed, so they can't automatically replace the file for you. Someone can just make a simple native installer to do so though.
Still, the tide appears to have turned, so the usefulness of restoring h.264 <video> support may decline within a year. People outside the Mac world will probably just standardize on a Flash video player instead of trying to support multiple playback frontends.
Unlike Firefox, Chrome extensions are sandboxed, so they can't automatically replace the file for you. Someone can just make a simple native installer to do so though.
Still, the tide appears to have turned, so the usefulness of restoring h.264 <video> support may decline within a year. People outside the Mac world will probably just standardize on a Flash video player instead of trying to support multiple playback frontends.