Pass camera facing to WebKit

Pass camera facing to WebKit

We want to expose camera facing information in JS API. First step
is to pass it to MediaStreamVideoTrack::getSettings().

BUG=webrtc:2481, 543997, 684375
TEST=Log the camera facing value in VideoCaptureImplManager

Review-Url: https://codereview.chromium.org/2609863004
Cr-Commit-Position: refs/heads/master@{#445663}
(cherry picked from commit 5466f424bef9d4997ff78783f9bb2ec4acbbabcc)

Review-Url: https://codereview.chromium.org/2667763003 .
Cr-Commit-Position: refs/branch-heads/2987@{#212}
Cr-Branched-From: ad51088c0e8776e8dcd963dbe752c4035ba6dab6-refs/heads/master@{#444943}
Committed: https://chromium.googlesource.com/chromium/src/+/09d60fcf9d6f8b85a5172e39befb50b617ef40bd

[wuchengli, 2017-01-31 02:58:38]

Description was changed from

==========
Pass camera facing to WebKit

We want to expose camera facing information in JS API. First step
is to pass it to MediaStreamVideoTrack::getSettings().

BUG=webrtc:2481, 543997, 684375
TEST=Log the camera facing value in VideoCaptureImplManager

Review-Url: https://codereview.chromium.org/2609863004
Cr-Commit-Position: refs/heads/master@{#445663}
(cherry picked from commit 5466f424bef9d4997ff78783f9bb2ec4acbbabcc)
==========

to

==========
Pass camera facing to WebKit

We want to expose camera facing information in JS API. First step
is to pass it to MediaStreamVideoTrack::getSettings().

BUG=webrtc:2481, 543997, 684375
TEST=Log the camera facing value in VideoCaptureImplManager

Review-Url: https://codereview.chromium.org/2609863004
Cr-Commit-Position: refs/heads/master@{#445663}
(cherry picked from commit 5466f424bef9d4997ff78783f9bb2ec4acbbabcc)

Review-Url: https://codereview.chromium.org/2667763003 .
Cr-Commit-Position: refs/branch-heads/2987@{#212}
Cr-Branched-From:
ad51088c0e8776e8dcd963dbe752c4035ba6dab6-refs/heads/master@{#444943}
Committed:
https://chromium.googlesource.com/chromium/src/+/09d60fcf9d6f8b85a5172e39befb...
==========

[wuchengli, 2017-01-31 02:58:40]

Committed patchset #1 (id:1) manually as
09d60fcf9d6f8b85a5172e39befb50b617ef40bd.