If no device specified, get the first device found

If no device specified, get the first device found

This makes adb_reverse_forwarder.py a little more convenient
to use.

BUG=429859
Committed: https://crrev.com/a21bde9f055f3ed2cfc36f3022cabad0e44831b0
Cr-Commit-Position: refs/heads/master@{#302548}

[danduong, 2014-11-03 23:13:15]

danduong@chromium.org changed reviewers:
+ jbudorick@chromium.org

[jbudorick, 2014-11-03 23:22:50]

lgtm w/ nit

Also, because I'm curious: where are you using this?

https://codereview.chromium.org/684383004/diff/1/build/android/adb_reverse_fo...
File build/android/adb_reverse_forwarder.py (right):

https://codereview.chromium.org/684383004/diff/1/build/android/adb_reverse_fo...
build/android/adb_reverse_forwarder.py:62: if not devices:
nit: shuffle this around a little s.t. you print the defaulting message on
unspecified device with one device attached, e.g.

  if options.device:
    ...
  else:
    if not devices:
      ...
    print ...

[danduong, 2014-11-04 00:21:48]

https://codereview.chromium.org/684383004/diff/1/build/android/adb_reverse_fo...
File build/android/adb_reverse_forwarder.py (right):

https://codereview.chromium.org/684383004/diff/1/build/android/adb_reverse_fo...
build/android/adb_reverse_forwarder.py:62: if not devices:
On 2014/11/03 23:22:50, jbudorick wrote:
> nit: shuffle this around a little s.t. you print the defaulting message on
> unspecified device with one device attached, e.g.
> 
>   if options.device:
>     ...
>   else:
>     if not devices:
>       ...
>     print ...

Done.

[jbudorick, 2014-11-04 00:23:27]

lgtm

[danduong, 2014-11-04 00:23:39]

The CQ bit was checked by danduong@chromium.org

[commit-bot: I haz the power, 2014-11-04 00:24:25]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/684383004/20001

[commit-bot: I haz the power, 2014-11-04 02:14:46]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2014-11-04 02:15:31]

Patchset 2 (id:??) landed as
https://crrev.com/a21bde9f055f3ed2cfc36f3022cabad0e44831b0
Cr-Commit-Position: refs/heads/master@{#302548}