The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/ef922c8f4b3f8efd97b9e92c882a8803830e0d88

commit ef922c8f4b3f8efd97b9e92c882a8803830e0d88
Author: Scott Wu <scottwu@chromium.org>
Date: Fri Aug 03 08:09:01 2018

Refactor PasswordManagerClient to support optional MetricsRecorder.

Metrics recording is not enabled for ios web view. In order to make it optional in current password manager logic, refactor is needed like changing GetMetricsRecorder to return a pointer as well as adding nullptr checking logic.

Bug:  868817 
Cq-Include-Trybots: luci.chromium.try:ios-simulator-full-configs;master.tryserver.chromium.mac:ios-simulator-cronet
Change-Id: I8a5b7c9a835e72992a04cb15758a4e2ee86d748c
Reviewed-on: https://chromium-review.googlesource.com/1154848
Commit-Queue: Scott Wu <scottwu@chromium.org>
Reviewed-by: Hiroshi Ichikawa <ichikawa@chromium.org>
Reviewed-by: Vasilii Sukhanov <vasilii@chromium.org>
Cr-Commit-Position: refs/heads/master@{#580475}
[modify] https://crrev.com/ef922c8f4b3f8efd97b9e92c882a8803830e0d88/chrome/browser/password_manager/chrome_password_manager_client.cc
[modify] https://crrev.com/ef922c8f4b3f8efd97b9e92c882a8803830e0d88/chrome/browser/password_manager/chrome_password_manager_client.h
[modify] https://crrev.com/ef922c8f4b3f8efd97b9e92c882a8803830e0d88/components/password_manager/core/browser/password_autofill_manager.cc
[modify] https://crrev.com/ef922c8f4b3f8efd97b9e92c882a8803830e0d88/components/password_manager/core/browser/password_manager.cc
[modify] https://crrev.com/ef922c8f4b3f8efd97b9e92c882a8803830e0d88/components/password_manager/core/browser/password_manager.h
[modify] https://crrev.com/ef922c8f4b3f8efd97b9e92c882a8803830e0d88/components/password_manager/core/browser/password_manager_client.h
[modify] https://crrev.com/ef922c8f4b3f8efd97b9e92c882a8803830e0d88/components/password_manager/core/browser/stub_password_manager_client.cc
[modify] https://crrev.com/ef922c8f4b3f8efd97b9e92c882a8803830e0d88/components/password_manager/core/browser/stub_password_manager_client.h
[modify] https://crrev.com/ef922c8f4b3f8efd97b9e92c882a8803830e0d88/ios/chrome/browser/passwords/ios_chrome_password_manager_client.h
[modify] https://crrev.com/ef922c8f4b3f8efd97b9e92c882a8803830e0d88/ios/chrome/browser/passwords/ios_chrome_password_manager_client.mm