Convert the directory listing to run on top of the platform

Convert the directory listing to run on top of the platform

Previously we were using string concatenation to build up the directory
listing. Now we fetch some JSON from the server and use data binding to inflate
a directory listing.

This exmaple doesn't work yet because we're missing support for
template@repeat, but hopefully we'll get that soon.

Also, added support for setRequestHeader to XMLHttpRequest.

R=rafaelw@chromium.org

Committed: https://chromium.googlesource.com/external/mojo/+/00720115e085a41ab160a222543d3b90626e5d58

[rafaelw, 2014-11-03 20:06:04]

lgtm

https://codereview.chromium.org/688413005/diff/1/sky/examples/file-browser.sky
File sky/examples/file-browser.sky (right):

https://codereview.chromium.org/688413005/diff/1/sky/examples/file-browser.sk...
sky/examples/file-browser.sky:16: <template repeat="{{ directory in directories
}}">
if you want this to work now, you can just do

<template repeat="{{ directories }}">
  <a href="{{}}">{{}}</a>
</template>

i.e. it's only the "named" scoping that's not hooked up. repeating works. {{}}
is |this| value

same below.

[abarth-chromium, 2014-11-03 20:53:12]

On 2014/11/03 at 20:06:04, rafaelw wrote:
> lgtm
> 
> https://codereview.chromium.org/688413005/diff/1/sky/examples/file-browser.sky
> File sky/examples/file-browser.sky (right):
> 
>
https://codereview.chromium.org/688413005/diff/1/sky/examples/file-browser.sk...
> sky/examples/file-browser.sky:16: <template repeat="{{ directory in
directories }}">
> if you want this to work now, you can just do
> 
> <template repeat="{{ directories }}">
>   <a href="{{}}">{{}}</a>
> </template>
> 
> i.e. it's only the "named" scoping that's not hooked up. repeating works. {{}}
is |this| value
> 
> same below.

Hum...  That doesn't seem to work...

[abarth-chromium, 2014-11-03 20:53:46]

Committed patchset #1 (id:1) manually as
00720115e085a41ab160a222543d3b90626e5d58 (presubmit successful).