Sort camera device list to use front camera first

Sort camera device list to use front camera first

Since javascript doesn't have API to get camera facing, we sort the
reported camera device list by facing. Then app can use the front
camera by default.

BUG=684224, chrome-os-partner:61756
TEST=powerwash device and camera app uses the front camera by default.

Review-Url: https://codereview.chromium.org/2648973003
Cr-Commit-Position: refs/heads/master@{#446307}
(cherry picked from commit e9c70e53e5da9b0065ef7f5c6ce78d5b46e49875)

Review-Url: https://codereview.chromium.org/2668633002 .
Cr-Commit-Position: refs/branch-heads/2987@{#214}
Cr-Branched-From: ad51088c0e8776e8dcd963dbe752c4035ba6dab6-refs/heads/master@{#444943}
Committed: https://chromium.googlesource.com/chromium/src/+/e0221ccb1eea16293cff0c0a0cda5a110266a5d5

[wuchengli, 2017-01-31 03:05:28]

Description was changed from

==========
Sort camera device list to use front camera first

Since javascript doesn't have API to get camera facing, we sort the
reported camera device list by facing. Then app can use the front
camera by default.

BUG=684224,chrome-os-partner:61756
TEST=powerwash device and camera app uses the front camera by default.

Review-Url: https://codereview.chromium.org/2648973003
Cr-Commit-Position: refs/heads/master@{#446307}
(cherry picked from commit e9c70e53e5da9b0065ef7f5c6ce78d5b46e49875)
==========

to

==========
Sort camera device list to use front camera first

Since javascript doesn't have API to get camera facing, we sort the
reported camera device list by facing. Then app can use the front
camera by default.

BUG=684224,chrome-os-partner:61756
TEST=powerwash device and camera app uses the front camera by default.

Review-Url: https://codereview.chromium.org/2648973003
Cr-Commit-Position: refs/heads/master@{#446307}
(cherry picked from commit e9c70e53e5da9b0065ef7f5c6ce78d5b46e49875)

Review-Url: https://codereview.chromium.org/2668633002 .
Cr-Commit-Position: refs/branch-heads/2987@{#214}
Cr-Branched-From:
ad51088c0e8776e8dcd963dbe752c4035ba6dab6-refs/heads/master@{#444943}
Committed:
https://chromium.googlesource.com/chromium/src/+/e0221ccb1eea16293cff0c0a0cda...
==========

[wuchengli, 2017-01-31 03:05:31]

Committed patchset #1 (id:1) manually as
e0221ccb1eea16293cff0c0a0cda5a110266a5d5.