Do not re-select active device if a lower priority device is hotplugged in and user has already sel…

Do not re-select active device if a lower priority device is hotplugged in and user has already selected active device previously.

BUG=447826
Committed: https://crrev.com/731ba26a6f6e4a5a28e4b163622d4c60f07eb9c2
Cr-Commit-Position: refs/heads/master@{#314844}

[jennyz, 2015-02-04 00:30:13]

jennyz@chromium.org changed reviewers:
+ hychao@chromium.org

[hychao, 2015-02-05 01:53:04]

lgtm

[jennyz, 2015-02-05 02:08:32]

The CQ bit was checked by jennyz@chromium.org

[commit-bot: I haz the power, 2015-02-05 02:09:36]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/872303003/1

[commit-bot: I haz the power, 2015-02-05 02:09:37]

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

[commit-bot: I haz the power, 2015-02-05 02:09:38]

No LGTM from a valid reviewer yet. Only full committers are accepted.
Even if an LGTM may have been provided, it was from a non-committer,
_not_ a full super star committer.
See http://www.chromium.org/getting-involved/become-a-committer
Note that this has nothing to do with OWNERS files.

[jennyz, 2015-02-05 18:10:14]

jennyz@chromium.org changed reviewers:
+ hshi@google.com

[jennyz, 2015-02-05 18:10:26]

jennyz@chromium.org changed reviewers:
+ hshi@chromium.org
- hshi@google.com

[hshi1, 2015-02-05 18:13:29]

LGTM

[jennyz, 2015-02-05 18:13:47]

The CQ bit was checked by jennyz@chromium.org

[commit-bot: I haz the power, 2015-02-05 18:14:37]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/872303003/1

[commit-bot: I haz the power, 2015-02-05 19:00:31]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-02-05 19:01:22]

Patchset 1 (id:??) landed as
https://crrev.com/731ba26a6f6e4a5a28e4b163622d4c60f07eb9c2
Cr-Commit-Position: refs/heads/master@{#314844}