The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/399f968b1df1818493aa5b8b2031764a8ebccd4f

commit 399f968b1df1818493aa5b8b2031764a8ebccd4f
Author: Joy Ming <jming@chromium.org>
Date: Fri Jul 28 17:34:22 2017

Refactor non-progress download updates to not be batched.

Before this CL, all updates from native to Java (DownloadManagerService
to SystemDownloadNotifier) were batched and sent every second. However,
for the refactor that makes downloads a foreground service, immediate
updates are required for the cases that are not related to progress, or
where a download is paused, cancelled, completed, or interrupted. This
CL refactors the DownloadManagerService so that the updates are
immediate except for those related to download progress, which continue
to be batched.

Bug:  747567 , 747563 
Change-Id: I687fd42d14be8cda3b4ea4cd287220037e15b7a0
Reviewed-on: https://chromium-review.googlesource.com/585776
Commit-Queue: Joy Ming <jming@chromium.org>
Reviewed-by: David Trainor <dtrainor@chromium.org>
Reviewed-by: Min Qin <qinmin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#490445}
[modify] https://crrev.com/399f968b1df1818493aa5b8b2031764a8ebccd4f/chrome/android/java/src/org/chromium/chrome/browser/download/DownloadManagerService.java
[modify] https://crrev.com/399f968b1df1818493aa5b8b2031764a8ebccd4f/chrome/android/javatests/src/org/chromium/chrome/browser/download/DownloadManagerServiceTest.java