The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/49873f22bfc576f26a79553c2b6054b145101e84

commit 49873f22bfc576f26a79553c2b6054b145101e84
Author: Ioana Pandele <ioanap@chromium.org>
Date: Thu May 17 11:52:53 2018

Remove leftover exported files when passwords are deleted

The password export operation saves a temporary file containing passwords locally, in order to pass
the data to the consumer app. There are cases in which the file is not removed when the export
finishes.

Deleting these temporary files when passwords are removed from local storage (keychain)
ensures  that they are not persisted on the device past their intended removal.

Bug:842127

Cq-Include-Trybots: master.tryserver.chromium.mac:ios-simulator-cronet;master.tryserver.chromium.mac:ios-simulator-full-configs
Change-Id: I0e965b41a726240714d209646a9394a35995f9e7
Reviewed-on: https://chromium-review.googlesource.com/1047869
Commit-Queue: Ioana Pandele <ioanap@chromium.org>
Reviewed-by: Sylvain Defresne <sdefresne@chromium.org>
Reviewed-by: Vasilii Sukhanov <vasilii@chromium.org>
Cr-Commit-Position: refs/heads/master@{#559494}
[modify] https://crrev.com/49873f22bfc576f26a79553c2b6054b145101e84/components/password_manager/core/browser/login_database_ios.cc
[modify] https://crrev.com/49873f22bfc576f26a79553c2b6054b145101e84/components/password_manager/core/browser/login_database_ios_unittest.cc
[modify] https://crrev.com/49873f22bfc576f26a79553c2b6054b145101e84/components/password_manager/core/browser/login_database_unittest.cc
[modify] https://crrev.com/49873f22bfc576f26a79553c2b6054b145101e84/components/password_manager/core/common/BUILD.gn
[add] https://crrev.com/49873f22bfc576f26a79553c2b6054b145101e84/components/password_manager/core/common/passwords_directory_util_ios.cc
[add] https://crrev.com/49873f22bfc576f26a79553c2b6054b145101e84/components/password_manager/core/common/passwords_directory_util_ios.h
[add] https://crrev.com/49873f22bfc576f26a79553c2b6054b145101e84/components/password_manager/core/common/passwords_directory_util_ios_unittest.cc
[modify] https://crrev.com/49873f22bfc576f26a79553c2b6054b145101e84/ios/chrome/app/main_controller.mm
[modify] https://crrev.com/49873f22bfc576f26a79553c2b6054b145101e84/ios/chrome/browser/passwords/BUILD.gn
[delete] https://crrev.com/72fbe934d9fd3d62dc5892d9b00768a72eece63f/ios/chrome/browser/passwords/passwords_directory_util.h
[delete] https://crrev.com/72fbe934d9fd3d62dc5892d9b00768a72eece63f/ios/chrome/browser/passwords/passwords_directory_util.mm
[delete] https://crrev.com/72fbe934d9fd3d62dc5892d9b00768a72eece63f/ios/chrome/browser/passwords/passwords_directory_util_unittest.mm
[modify] https://crrev.com/49873f22bfc576f26a79553c2b6054b145101e84/ios/chrome/browser/ui/settings/password_exporter.h
[modify] https://crrev.com/49873f22bfc576f26a79553c2b6054b145101e84/ios/chrome/browser/ui/settings/password_exporter.mm