The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/8a0e9ba9f3becb1492b462c57c63bc245c7e8508

commit 8a0e9ba9f3becb1492b462c57c63bc245c7e8508
Author: Eugene But <eugenebut@google.com>
Date: Mon Dec 11 22:21:21 2017

Added DownloadTask::GetHttpCode() method.

This method will be user for reporting Download.IOSDownloadPassKitResult
UMA metric.

Bug:  789735 
Cq-Include-Trybots: master.tryserver.chromium.mac:ios-simulator-cronet;master.tryserver.chromium.mac:ios-simulator-full-configs
Change-Id: Ic39d5ea1869dfb4e7f45e0ffa2902829a2e09a6d
Reviewed-on: https://chromium-review.googlesource.com/817950
Commit-Queue: Eugene But <eugenebut@chromium.org>
Reviewed-by: Gregory Chatzinoff <gchatz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#523232}
[modify] https://crrev.com/8a0e9ba9f3becb1492b462c57c63bc245c7e8508/ios/web/download/download_inttest.mm
[modify] https://crrev.com/8a0e9ba9f3becb1492b462c57c63bc245c7e8508/ios/web/download/download_task_impl.h
[modify] https://crrev.com/8a0e9ba9f3becb1492b462c57c63bc245c7e8508/ios/web/download/download_task_impl.mm
[modify] https://crrev.com/8a0e9ba9f3becb1492b462c57c63bc245c7e8508/ios/web/download/download_task_impl_unittest.mm
[modify] https://crrev.com/8a0e9ba9f3becb1492b462c57c63bc245c7e8508/ios/web/public/download/download_task.h
[modify] https://crrev.com/8a0e9ba9f3becb1492b462c57c63bc245c7e8508/ios/web/public/test/fakes/fake_download_task.h
[modify] https://crrev.com/8a0e9ba9f3becb1492b462c57c63bc245c7e8508/ios/web/public/test/fakes/fake_download_task.mm

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/083b4ff273535766cd724ec442cc5f2b7397580b

commit 083b4ff273535766cd724ec442cc5f2b7397580b
Author: Eugene But <eugenebut@google.com>
Date: Wed Dec 13 23:54:24 2017

Report Download.IOSDownloadPassKitResult UMA.

This CL implements exising metrics reported by CRWPassKitDownloader.
UMA constants are duplicated, which is fine because old constants will
be removed along with CRWPassKitDownloader class.

Bug:  789735 
Cq-Include-Trybots: master.tryserver.chromium.mac:ios-simulator-cronet;master.tryserver.chromium.mac:ios-simulator-full-configs
Change-Id: I455e9247ed4493dbc7f3d59a74e1f5806e167956
Reviewed-on: https://chromium-review.googlesource.com/822528
Reviewed-by: Gregory Chatzinoff <gchatz@chromium.org>
Commit-Queue: Eugene But <eugenebut@chromium.org>
Cr-Commit-Position: refs/heads/master@{#523931}
[modify] https://crrev.com/083b4ff273535766cd724ec442cc5f2b7397580b/ios/chrome/browser/download/pass_kit_tab_helper.h
[modify] https://crrev.com/083b4ff273535766cd724ec442cc5f2b7397580b/ios/chrome/browser/download/pass_kit_tab_helper.mm
[modify] https://crrev.com/083b4ff273535766cd724ec442cc5f2b7397580b/ios/chrome/browser/download/pass_kit_tab_helper_unittest.mm

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/76f7a6b5a791a1c930ecd9609766a6be4d1cb9ed

commit 76f7a6b5a791a1c930ecd9609766a6be4d1cb9ed
Author: Eugene But <eugenebut@google.com>
Date: Tue Dec 19 06:53:09 2017

Added Download.IOSPresentAddPassesDialogResult metric.

Bug:  789735 
Cq-Include-Trybots: master.tryserver.chromium.mac:ios-simulator-cronet;master.tryserver.chromium.mac:ios-simulator-full-configs
Change-Id: I23f6210c095834d36c1fc976c3924b4398a80f1e
Reviewed-on: https://chromium-review.googlesource.com/824948
Commit-Queue: Eugene But <eugenebut@chromium.org>
Reviewed-by: Mark Pearson <mpearson@chromium.org>
Reviewed-by: Gregory Chatzinoff <gchatz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#524960}
[modify] https://crrev.com/76f7a6b5a791a1c930ecd9609766a6be4d1cb9ed/ios/chrome/browser/ui/download/pass_kit_coordinator.h
[modify] https://crrev.com/76f7a6b5a791a1c930ecd9609766a6be4d1cb9ed/ios/chrome/browser/ui/download/pass_kit_coordinator.mm
[modify] https://crrev.com/76f7a6b5a791a1c930ecd9609766a6be4d1cb9ed/ios/chrome/browser/ui/download/pass_kit_coordinator_unittest.mm
[modify] https://crrev.com/76f7a6b5a791a1c930ecd9609766a6be4d1cb9ed/tools/metrics/histograms/enums.xml
[modify] https://crrev.com/76f7a6b5a791a1c930ecd9609766a6be4d1cb9ed/tools/metrics/histograms/histograms.xml