[Media>UI] Don't show media metadata on lockscreen in Incognito mode

[Media>UI] Don't show media metadata on lockscreen in Incognito mode

Media notification content is marked as private in Incognito mode, so the
content is hidden on lockscreen. For the same reason, we shouldn't show the
artwork image on lockscreen and wearable devices.

BUG=683111
Review-Url: https://codereview.chromium.org/2646793006
Cr-Commit-Position: refs/heads/master@{#445745}
(cherry picked from commit 233f53ad273ef485ff5b12510b421a5ab4d429ec)

Review-Url: https://codereview.chromium.org/2657653002 .
Cr-Commit-Position: refs/branch-heads/2987@{#65}
Cr-Branched-From: ad51088c0e8776e8dcd963dbe752c4035ba6dab6-refs/heads/master@{#444943}
Committed: https://chromium.googlesource.com/chromium/src/+/da78931d22bf9f4e20cf19b6c583a253f20ea0c9

[Zhiqiang Zhang (Slow), 2017-01-24 19:11:01]

Description was changed from

==========
[Media>UI] Don't show media metadata on lockscreen in Incognito mode

Media notification content is marked as private in Incognito mode, so the
content is hidden on lockscreen. For the same reason, we shouldn't show the
artwork image on lockscreen and wearable devices.

BUG=683111

Review-Url: https://codereview.chromium.org/2646793006
Cr-Commit-Position: refs/heads/master@{#445745}
(cherry picked from commit 233f53ad273ef485ff5b12510b421a5ab4d429ec)
==========

to

==========
[Media>UI] Don't show media metadata on lockscreen in Incognito mode

Media notification content is marked as private in Incognito mode, so the
content is hidden on lockscreen. For the same reason, we shouldn't show the
artwork image on lockscreen and wearable devices.

BUG=683111

Review-Url: https://codereview.chromium.org/2646793006
Cr-Commit-Position: refs/heads/master@{#445745}
(cherry picked from commit 233f53ad273ef485ff5b12510b421a5ab4d429ec)

Review-Url: https://codereview.chromium.org/2657653002 .
Cr-Commit-Position: refs/branch-heads/2987@{#65}
Cr-Branched-From:
ad51088c0e8776e8dcd963dbe752c4035ba6dab6-refs/heads/master@{#444943}
Committed:
https://chromium.googlesource.com/chromium/src/+/da78931d22bf9f4e20cf19b6c583...
==========

[Zhiqiang Zhang (Slow), 2017-01-24 19:11:02]

Committed patchset #1 (id:1) manually as
da78931d22bf9f4e20cf19b6c583a253f20ea0c9.