Add fileSystemProvider API extension example.

Add fileSystemProvider API extension example.

A simple cloud extension example that uses the file system provider API
This example is different from https://codereview.chromium.org/360673004
as it is an extension and not an app.

BUG=415847
R=mtomasz@chromium.org

Committed: https://crrev.com/d5dfc9a8499bc06b5f0d349448824a7ba5d53e08
Cr-Commit-Position: refs/heads/master@{#296579}

[mtomasz, 2014-09-24 01:05:48]

It seems that after enabling FSP API for extensions, the previous examples show
up also at the extensions samples page:

https://developer.chrome.com/extensions/samples#search:filesystemprovider

Sorry for changing back and forth, but instead of duplicating the project, can
we just convert one of the existing examples (Fake Archive Handler) to an
extension? Also, we should add in the description that it is written as an app.
The first example (File System Provider API Example) should say that it is
written as an extension.

[cmihail, 2014-09-24 05:19:39]

On 2014/09/24 01:05:48, mtomasz wrote:
> It seems that after enabling FSP API for extensions, the previous examples
show
> up also at the extensions samples page:
> 
> https://developer.chrome.com/extensions/samples#search:filesystemprovider
> 
> Sorry for changing back and forth, but instead of duplicating the project, can
> we just convert one of the existing examples (Fake Archive Handler) to an
> extension? Also, we should add in the description that it is written as an
app.
> The first example (File System Provider API Example) should say that it is
> written as an extension.

Done.
Though only one can be converted to an extension: basic example.

Fake Archive Handler cannot be converted to an extension due to onLaunched
listener.

[mtomasz, 2014-09-24 05:21:32]

lgtm

[cmihail, 2014-09-24 05:23:28]

The CQ bit was checked by cmihail@chromium.org

[commit-bot: I haz the power, 2014-09-24 05:24:03]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/587293002/20001

[cmihail, 2014-09-24 05:24:52]

On 2014/09/24 05:21:32, mtomasz wrote:
> lgtm

I need also Kalman's ltgm no?

[mtomasz, 2014-09-24 05:31:45]

On 2014/09/24 05:24:52, cmihail wrote:
> On 2014/09/24 05:21:32, mtomasz wrote:
> > lgtm
> 
> I need also Kalman's ltgm no?

Yes. You need a review from an owner.

[commit-bot: I haz the power, 2014-09-24 05:33:24]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-09-24 05:33:25]

Try jobs failed on following builders:
  chromium_presubmit on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/chromium_presub...)

[cmihail, 2014-09-24 05:34:39]

On 2014/09/24 05:33:25, I haz the power (commit-bot) wrote:
> Try jobs failed on following builders:
>   chromium_presubmit on tryserver.chromium.linux
>
(http://build.chromium.org/p/tryserver.chromium.linux/builders/chromium_presub...)

Kalman is OOO. I have to look for someone else.

[cmihail, 2014-09-24 05:34:39]

On 2014/09/24 05:33:25, I haz the power (commit-bot) wrote:
> Try jobs failed on following builders:
>   chromium_presubmit on tryserver.chromium.linux
>
(http://build.chromium.org/p/tryserver.chromium.linux/builders/chromium_presub...)

Kalman is OOO. I have to look for someone else.

[cmihail, 2014-09-24 06:35:17]

cmihail@chromium.org changed reviewers:
+ rockot@chromium.org

[cmihail, 2014-09-24 06:35:56]

On 2014/09/24 05:34:39, cmihail wrote:
> On 2014/09/24 05:33:25, I haz the power (commit-bot) wrote:
> > Try jobs failed on following builders:
> >   chromium_presubmit on tryserver.chromium.linux
> >
>
(http://build.chromium.org/p/tryserver.chromium.linux/builders/chromium_presub...)
> 
> Kalman is OOO. I have to look for someone else.

Hi Ken,

Can you have a look at this changes?
Kalman is OOO and I need an Owner LGTM.

Thanks,
Mihail

[Ken Rockot(use gerrit already), 2014-09-24 14:38:24]

lgtm

[cmihail, 2014-09-24 23:54:13]

The CQ bit was checked by cmihail@chromium.org

[commit-bot: I haz the power, 2014-09-24 23:55:53]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/587293002/20001

[commit-bot: I haz the power, 2014-09-25 00:01:55]

Committed patchset #2 (id:20001) as c61294163d465bb02a8990867aa77c61b224a084

[commit-bot: I haz the power, 2014-09-25 00:02:30]

Patchset 2 (id:??) landed as
https://crrev.com/d5dfc9a8499bc06b5f0d349448824a7ba5d53e08
Cr-Commit-Position: refs/heads/master@{#296579}