The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/eff032d48fd7361504192c53d7a88ed88f11de12

commit eff032d48fd7361504192c53d7a88ed88f11de12
Author: Christian Dullweber <dullweber@chromium.org>
Date: Mon May 28 13:31:53 2018

Remove important sites on Desktop

The important sites ui for Desktop has not been worked on for a while
and there is no plan to finish it soon. This Cl removes the code to
make webui maintenance easier.

Bug:  845461 

Cq-Include-Trybots: master.tryserver.chromium.linux:closure_compilation
Change-Id: Ife3d67aa8a77a457097b4be7a59726338d0fcce0
Reviewed-on: https://chromium-review.googlesource.com/1069008
Commit-Queue: Christian Dullweber <dullweber@chromium.org>
Reviewed-by: Scott Chen <scottchen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#562247}
[modify] https://crrev.com/eff032d48fd7361504192c53d7a88ed88f11de12/chrome/app/settings_strings.grdp
[modify] https://crrev.com/eff032d48fd7361504192c53d7a88ed88f11de12/chrome/browser/about_flags.cc
[modify] https://crrev.com/eff032d48fd7361504192c53d7a88ed88f11de12/chrome/browser/resources/settings/clear_browsing_data_dialog/clear_browsing_data_browser_proxy.js
[modify] https://crrev.com/eff032d48fd7361504192c53d7a88ed88f11de12/chrome/browser/resources/settings/clear_browsing_data_dialog/clear_browsing_data_dialog.html
[modify] https://crrev.com/eff032d48fd7361504192c53d7a88ed88f11de12/chrome/browser/resources/settings/clear_browsing_data_dialog/clear_browsing_data_dialog.js
[modify] https://crrev.com/eff032d48fd7361504192c53d7a88ed88f11de12/chrome/browser/resources/settings/controls/BUILD.gn
[delete] https://crrev.com/0257046a7d6014205c898f17079f091eccae8f27/chrome/browser/resources/settings/controls/important_site_checkbox.html
[delete] https://crrev.com/0257046a7d6014205c898f17079f091eccae8f27/chrome/browser/resources/settings/controls/important_site_checkbox.js
[modify] https://crrev.com/eff032d48fd7361504192c53d7a88ed88f11de12/chrome/browser/resources/settings/settings_resources.grd
[modify] https://crrev.com/eff032d48fd7361504192c53d7a88ed88f11de12/chrome/browser/ui/webui/settings/md_settings_localized_strings_provider.cc
[modify] https://crrev.com/eff032d48fd7361504192c53d7a88ed88f11de12/chrome/browser/ui/webui/settings/settings_clear_browsing_data_handler.cc
[modify] https://crrev.com/eff032d48fd7361504192c53d7a88ed88f11de12/chrome/browser/ui/webui/settings/settings_clear_browsing_data_handler.h
[modify] https://crrev.com/eff032d48fd7361504192c53d7a88ed88f11de12/chrome/common/chrome_features.cc
[modify] https://crrev.com/eff032d48fd7361504192c53d7a88ed88f11de12/chrome/common/chrome_features.h
[modify] https://crrev.com/eff032d48fd7361504192c53d7a88ed88f11de12/chrome/test/data/webui/settings/privacy_page_test.js