Add initial SkyElement & city-list example

Add initial SkyElement & city-list example

BUG=
R=eseidel@chromium.org

Committed: https://chromium.googlesource.com/external/mojo/+/78ce7dacf51660ab6b6389479daf7d66e18c1d27

[rafaelw, 2014-10-31 19:03:02]

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

[eseidel, 2014-10-31 19:16:57]

rs lgtm

[rafaelw, 2014-10-31 19:30:08]

Committed patchset #6 (id:100001) manually as
78ce7dacf51660ab6b6389479daf7d66e18c1d27 (presubmit successful).

[ojan, 2014-10-31 19:40:19]

ojan@chromium.org changed reviewers:
- eseidel@chromium.org

[ojan, 2014-10-31 19:40:21]

Just some random questions from skimming this patch.

https://codereview.chromium.org/698653002/diff/40001/sky/examples/city-list/c...
File sky/examples/city-list/city-list.sky (right):

https://codereview.chromium.org/698653002/diff/40001/sky/examples/city-list/c...
sky/examples/city-list/city-list.sky:119: #scroller::-webkit-scrollbar {
Is this needed? We've been talking about removing custom scrollbar support.

https://codereview.chromium.org/698653002/diff/40001/sky/examples/city-list/c...
sky/examples/city-list/city-list.sky:249: console.log(ex.stack);
Did we fork before promises correctly logged uncaught exceptions to the console?
Actually...I'm not even sure they do on tip of tree blink at the moment. This is
something we're going to have to fix.

[rafaelw, 2014-11-04 19:01:56]

https://codereview.chromium.org/698653002/diff/40001/sky/examples/city-list/c...
File sky/examples/city-list/city-list.sky (right):

https://codereview.chromium.org/698653002/diff/40001/sky/examples/city-list/c...
sky/examples/city-list/city-list.sky:119: #scroller::-webkit-scrollbar {
Probably not, since it doesn't do anything.

The desired behavior here was to have a truely infinite list, without any
scrollbar.

I'm not sure I feel strongly about styling the built-in scroll bar, but it seems
like we need a way to use the platform's scrolling, but not show a scroll bar.

On 2014/10/31 19:40:21, ojan wrote:
> Is this needed? We've been talking about removing custom scrollbar support.

https://codereview.chromium.org/698653002/diff/40001/sky/examples/city-list/c...
sky/examples/city-list/city-list.sky:249: console.log(ex.stack);
The do not (log uncaught exceptions) to the console in sky -- which is a pretty
big bummer.

On 2014/10/31 19:40:21, ojan wrote:
> Did we fork before promises correctly logged uncaught exceptions to the
console?
> Actually...I'm not even sure they do on tip of tree blink at the moment. This
is
> something we're going to have to fix.