The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/411fb85ffd1c2478c78e9f6e6105d4c88f38ad96

commit 411fb85ffd1c2478c78e9f6e6105d4c88f38ad96
Author: Joy Ming <jming@chromium.org>
Date: Tue Aug 15 20:55:21 2017

Reroute notification interactions directly to DownloadBroadcastManager.

This is part of a larger refactor to make downloads a foreground
service. The DownloadBroadcastManager (DBM) is designed to handle all
interactions with the notifications that needed to be propagated to
native. Before this CL, notification interactions were received by the
DownloadBroadcastReceiver (DBR), sent to the DownloadNotificationService
(DNS), and then propagated to native by DBM. This CL makes the DBM a
service, allowing the notification interactions to directly start the 
DBM so that it no longer has to go through the DBR and DNS.

Bug:  749880 , 747563 
Change-Id: Iaef62292433a53e28366d796f7cfe9932e2fb28a
Reviewed-on: https://chromium-review.googlesource.com/611144
Commit-Queue: Joy Ming <jming@chromium.org>
Reviewed-by: David Trainor <dtrainor@chromium.org>
Cr-Commit-Position: refs/heads/master@{#494535}
[modify] https://crrev.com/411fb85ffd1c2478c78e9f6e6105d4c88f38ad96/chrome/android/java/AndroidManifest.xml
[modify] https://crrev.com/411fb85ffd1c2478c78e9f6e6105d4c88f38ad96/chrome/android/java/src/org/chromium/chrome/browser/download/DownloadBroadcastManager.java
[modify] https://crrev.com/411fb85ffd1c2478c78e9f6e6105d4c88f38ad96/chrome/android/java/src/org/chromium/chrome/browser/download/DownloadBroadcastReceiver.java
[modify] https://crrev.com/411fb85ffd1c2478c78e9f6e6105d4c88f38ad96/chrome/android/java/src/org/chromium/chrome/browser/download/DownloadNotificationFactory.java
[modify] https://crrev.com/411fb85ffd1c2478c78e9f6e6105d4c88f38ad96/chrome/android/java/src/org/chromium/chrome/browser/download/DownloadNotificationService.java
[modify] https://crrev.com/411fb85ffd1c2478c78e9f6e6105d4c88f38ad96/chrome/android/javatests/src/org/chromium/chrome/browser/download/DownloadNotificationServiceTest.java
[modify] https://crrev.com/411fb85ffd1c2478c78e9f6e6105d4c88f38ad96/chrome/android/javatests/src/org/chromium/chrome/browser/download/MockDownloadNotificationService.java