Automatically open FSP mounted file systems.

Automatically open FSP mounted file systems.

When opening an archive with the new ZIP unpacker based on the File System
Provider API, we need to open on once it's mounted in the left nav.

However, in the current design, we can't say if a newly mounted volume is
a result of opening an archive.

As a temporary workaround, this CL makes Files app open all FSP based volumes
once they are mounted, but only in the focused window.

TEST=Tested manually with the new ZIP unpacker.
BUG=427776
Committed: https://crrev.com/1c9e1d8a79ec43dd347a63146d8d490b9757c9ca
Cr-Commit-Position: refs/heads/master@{#302221}

[mtomasz, 2014-10-31 04:05:37]

mtomasz@chromium.org changed reviewers:
+ hirono@chromium.org

[mtomasz, 2014-10-31 04:05:37]

@hirono: PTAL. I'm not proud of this solution. Please see the discussion in the
bug issue if in doubt. Thanks.

[hirono, 2014-10-31 04:14:42]

lgtm!

[mtomasz, 2014-10-31 04:15:05]

On 2014/10/31 04:14:42, hirono wrote:
> lgtm!

Thanks!

[mtomasz, 2014-10-31 04:15:13]

The CQ bit was checked by mtomasz@chromium.org

[commit-bot: I haz the power, 2014-10-31 04:15:48]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/695713002/20001

[commit-bot: I haz the power, 2014-10-31 04:50:25]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2014-10-31 04:51:04]

Patchset 2 (id:??) landed as
https://crrev.com/1c9e1d8a79ec43dd347a63146d8d490b9757c9ca
Cr-Commit-Position: refs/heads/master@{#302221}