Don't force the download notifier to unbind

Don't force the download notifier to unbind

The DownloadNotificationService tells the SystemDownloadNotifier to
unbind from it when it has no notifications to show and wants to shut
itself down.  This isn't needed because the SystemDownloadNotifier will
unbind when it is a safe time for the service to die.  This patch
removes the Observer method that tells the SystemDownloadNotifier to
unbind itself.

BUG=703212
Review-Url: https://codereview.chromium.org/2771353002
Cr-Commit-Position: refs/heads/master@{#460641}
(cherry picked from commit 008b3fe04b6cefb33e44ebb30c4a2fc5881d6d40)

Review-Url: https://codereview.chromium.org/2795583002 .
Cr-Commit-Position: refs/branch-heads/3029@{#531}
Cr-Branched-From: 939b32ee5ba05c396eef3fd992822fcca9a2e262-refs/heads/master@{#454471}
Committed: https://chromium.googlesource.com/chromium/src/+/6b74cf25e32daf095f452c397353ff23aa89d09a

[David Trainor- moved to gerrit, 2017-04-02 16:50:50]

Description was changed from

==========
Don't force the download notifier to unbind

The DownloadNotificationService tells the SystemDownloadNotifier to
unbind from it when it has no notifications to show and wants to shut
itself down.  This isn't needed because the SystemDownloadNotifier will
unbind when it is a safe time for the service to die.  This patch
removes the Observer method that tells the SystemDownloadNotifier to
unbind itself.

BUG=703212

Review-Url: https://codereview.chromium.org/2771353002
Cr-Commit-Position: refs/heads/master@{#460641}
(cherry picked from commit 008b3fe04b6cefb33e44ebb30c4a2fc5881d6d40)
==========

to

==========
Don't force the download notifier to unbind

The DownloadNotificationService tells the SystemDownloadNotifier to
unbind from it when it has no notifications to show and wants to shut
itself down.  This isn't needed because the SystemDownloadNotifier will
unbind when it is a safe time for the service to die.  This patch
removes the Observer method that tells the SystemDownloadNotifier to
unbind itself.

BUG=703212

Review-Url: https://codereview.chromium.org/2771353002
Cr-Commit-Position: refs/heads/master@{#460641}
(cherry picked from commit 008b3fe04b6cefb33e44ebb30c4a2fc5881d6d40)

Review-Url: https://codereview.chromium.org/2795583002 .
Cr-Commit-Position: refs/branch-heads/3029@{#531}
Cr-Branched-From:
939b32ee5ba05c396eef3fd992822fcca9a2e262-refs/heads/master@{#454471}
Committed:
https://chromium.googlesource.com/chromium/src/+/6b74cf25e32daf095f452c397353...
==========

[David Trainor- moved to gerrit, 2017-04-02 16:50:51]

Committed patchset #1 (id:1) manually as
6b74cf25e32daf095f452c397353ff23aa89d09a (tree was closed).