Rework hotkeys; fill browser with video

- Use hotkeys without control chars (similar to Gmail)
- Add hotkey for fullscreen, change mute to Space
- When going fullscreen, show local video as well
- Make local video slightly smaller and add a small border
- Use object-fit: cover to stretch video to fill the browser (no
letterboxing)

@samdutton @jiayliu PTAL
done

On Mon, Dec 1, 2014 at 6:27 PM, Jiayang Liu <notifications@github.com>
wrote:

> In samples/web/content/apprtc/js/main.js:
>
> >    switch (event.keyCode) {
> > -    case 68:
> > +    case 32:  // 'space'
>
> If we set onkeypress, instead of onkeydown, we can use
> String.fromCharCode(event.charCode) to get rid of the magic numbers.
>
> —
> Reply to this email directly or view it on GitHub
> <https://github.com/GoogleChrome/webrtc/pull/255/files#r21136963>.
>