Can I work on this?

Yes. I don't have any plans for it yet. I don't even have broadband connection by now.

Barring a compiler error with an UMA macro, this is almost ready to be submitted for review.

Sent for review.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/87b7a3fcc1bce355eae717c60c35309dcb0b8353

commit 87b7a3fcc1bce355eae717c60c35309dcb0b8353
Author: tfarina <tfarina@chromium.org>
Date: Fri Oct 21 01:35:24 2016

chrome: change ProfileErrorType enum into an enum class

See http://www.stroustrup.com/C++11FAQ.html#enum to see why enum class
is preferred over traditional enums.

BUG= 621555 
R=thestig@chromium.org

Review-Url: https://chromiumcodereview.appspot.com/2438433006
Cr-Commit-Position: refs/heads/master@{#426682}

[modify] https://crrev.com/87b7a3fcc1bce355eae717c60c35309dcb0b8353/chrome/browser/chrome_browser_main.cc
[modify] https://crrev.com/87b7a3fcc1bce355eae717c60c35309dcb0b8353/chrome/browser/history/chrome_history_client.cc
[modify] https://crrev.com/87b7a3fcc1bce355eae717c60c35309dcb0b8353/chrome/browser/prefs/chrome_pref_service_factory.cc
[modify] https://crrev.com/87b7a3fcc1bce355eae717c60c35309dcb0b8353/chrome/browser/ui/profile_error_dialog.cc
[modify] https://crrev.com/87b7a3fcc1bce355eae717c60c35309dcb0b8353/chrome/browser/ui/profile_error_dialog.h
[modify] https://crrev.com/87b7a3fcc1bce355eae717c60c35309dcb0b8353/chrome/browser/web_data_service_factory.cc