Add shadowRootReady callback for SkyElement.

Add shadowRootReady callback for SkyElement.

This is called right after stamping the template into the ShadowRoot.
This is a useful place to querySelector/getElementById for elements
inside the ShadowRoot.

R=eseidel@chromium.org

Committed: https://chromium.googlesource.com/external/mojo/+/ae54708999b008c42089e90fd821f872d3a4a24d

[esprehn, 2014-12-19 21:55:33]

esprehn@chromium.org changed reviewers:
+ eseidel@chromium.org, rafaelw@chromium.org

[eseidel, 2014-12-19 21:58:39]

lgtm.  WE could probably have a better name.  "createdTemplate" feels to me like
a "Template" was just "created", where as what you mean here is that the
template was stamped out into the dom or something.

[esprehn, 2014-12-19 22:01:39]

On 2014/12/19 at 21:58:39, eseidel wrote:
> lgtm.  WE could probably have a better name.  "createdTemplate" feels to me
like a "Template" was just "created", where as what you mean here is that the
template was stamped out into the dom or something.

Renamed to shadowRootReady to match polymer.

[esprehn, 2014-12-19 22:01:54]

Committed patchset #2 (id:20001) manually as
ae54708999b008c42089e90fd821f872d3a4a24d (presubmit successful).

[rafaelw, 2014-12-19 23:18:40]

lgtm