The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/927312747a47d9aef1b08217f590c6b83c13e174

commit 927312747a47d9aef1b08217f590c6b83c13e174
Author: qinmin <qinmin@chromium.org>
Date: Wed Nov 30 15:35:35 2016

Add paused download into SharedPreferences

When download is manually paused, currently it is not stored in SharedPreferences.
This is reasonable if download can only be resumed from the notification.
However, with download home, resuming a paused download will require Chrome to know the notification Id.
This CL stores the paused download into SharedPreferences.
So that the notification Id can be retrieved when resuming a download from download Home.

BUG= 669702 

Review-Url: https://codereview.chromium.org/2542483002
Cr-Commit-Position: refs/heads/master@{#435266}

[modify] https://crrev.com/927312747a47d9aef1b08217f590c6b83c13e174/chrome/android/java/src/org/chromium/chrome/browser/download/DownloadNotificationService.java
[modify] https://crrev.com/927312747a47d9aef1b08217f590c6b83c13e174/chrome/android/java/src/org/chromium/chrome/browser/download/DownloadSharedPreferenceEntry.java
[modify] https://crrev.com/927312747a47d9aef1b08217f590c6b83c13e174/chrome/android/javatests/src/org/chromium/chrome/browser/download/DownloadNotificationServiceTest.java
[modify] https://crrev.com/927312747a47d9aef1b08217f590c6b83c13e174/chrome/android/junit/src/org/chromium/chrome/browser/download/DownloadSharedPreferenceEntryTest.java

Are we targeting for M56 or M57?

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/06274d14c37bebbf2e5c4acf9b0bce24ca7f2c17

commit 06274d14c37bebbf2e5c4acf9b0bce24ca7f2c17
Author: qinmin <qinmin@chromium.org>
Date: Thu Dec 01 17:34:39 2016

Remove unnecessary extra field from download notification intent

Chrome stores those information in SharedPreferences for all downloads now.
So there is no need to keep those extra fields.

BUG= 669702 

Review-Url: https://codereview.chromium.org/2544633003
Cr-Commit-Position: refs/heads/master@{#435639}

[modify] https://crrev.com/06274d14c37bebbf2e5c4acf9b0bce24ca7f2c17/chrome/android/java/src/org/chromium/chrome/browser/download/DownloadNotificationService.java