Fix <sky-input> data binding when editing deletes the last char.

Fix <sky-input> data binding when editing deletes the last char.

contenteditable would remove the Text node inside the
editable area which would mean setting the value attr
of the <sky-input> would stop updating the editable
area.

Instead we add the text back if editing removed it.

R=abarth@chromium.org, ojan@chromium.org

Committed: https://chromium.googlesource.com/external/mojo/+/7387509e1fd934812a3ef1bd1829bc9a0b3022ce

[abarth-chromium, 2015-01-16 07:11:01]

abarth@chromium.org changed reviewers:
+ abarth@chromium.org

[abarth-chromium, 2015-01-16 07:11:01]

Test?

LGTM

[esprehn, 2015-01-16 07:12:54]

On 2015/01/16 at 07:11:01, abarth wrote:
> Test?
> 
> LGTM

Yeah testing this requires simulating backspace keystrokes, I'll add one
tomorrow.

[abarth-chromium, 2015-01-16 07:13:46]

On 2015/01/16 at 07:12:54, esprehn wrote:
> On 2015/01/16 at 07:11:01, abarth wrote:
> > Test?
> > 
> > LGTM
> 
> Yeah testing this requires simulating backspace keystrokes, I'll add one
tomorrow.

eventSender can do that

[esprehn, 2015-01-16 22:39:07]

Committed patchset #4 (id:60001) manually as
7387509e1fd934812a3ef1bd1829bc9a0b3022ce (presubmit successful).