Properly clean up notification on download open

Properly clean up notification on download open

Now that downloads is a foreground service with the summary, we need to
manually clean up the summary in code, which means going through the
notification service to do it.

BUG=706094
Review-Url: https://codereview.chromium.org/2781873002
Cr-Commit-Position: refs/heads/master@{#460459}
(cherry picked from commit 6d71d9c5b9a95b7476beefaa9ace1fc8b54d5b43)

Review-Url: https://codereview.chromium.org/2789083002 .
Cr-Commit-Position: refs/branch-heads/3029@{#530}
Cr-Branched-From: 939b32ee5ba05c396eef3fd992822fcca9a2e262-refs/heads/master@{#454471}
Committed: https://chromium.googlesource.com/chromium/src/+/a3605a93ad1d456aadf346ef8eb5da59359b069a

[David Trainor- moved to gerrit, 2017-04-02 16:42:27]

Description was changed from

==========
Properly clean up notification on download open

Now that downloads is a foreground service with the summary, we need to
manually clean up the summary in code, which means going through the
notification service to do it.

BUG=706094

Review-Url: https://codereview.chromium.org/2781873002
Cr-Commit-Position: refs/heads/master@{#460459}
(cherry picked from commit 6d71d9c5b9a95b7476beefaa9ace1fc8b54d5b43)
==========

to

==========
Properly clean up notification on download open

Now that downloads is a foreground service with the summary, we need to
manually clean up the summary in code, which means going through the
notification service to do it.

BUG=706094

Review-Url: https://codereview.chromium.org/2781873002
Cr-Commit-Position: refs/heads/master@{#460459}
(cherry picked from commit 6d71d9c5b9a95b7476beefaa9ace1fc8b54d5b43)

Review-Url: https://codereview.chromium.org/2789083002 .
Cr-Commit-Position: refs/branch-heads/3029@{#530}
Cr-Branched-From:
939b32ee5ba05c396eef3fd992822fcca9a2e262-refs/heads/master@{#454471}
Committed:
https://chromium.googlesource.com/chromium/src/+/a3605a93ad1d456aadf346ef8eb5...
==========

[David Trainor- moved to gerrit, 2017-04-02 16:42:28]

Committed patchset #1 (id:1) manually as
a3605a93ad1d456aadf346ef8eb5da59359b069a (tree was closed).