This was caused by:
https://chromium-review.googlesource.com/c/chromium/src/+/661070

I am surprised we do not have a test to catch this :( I kind of assumed we did in the review. We should definitely add one.

We should revert the CL right away then add a test that would catch this and fix the CL.

Sorry for this, will revert this cl now, fix it and add a test for it.

+1 on adding tests for this. Also the way we use pageVisibility is a bit confusing (but performant), and it is explained by this comment in the code

"All pages are visible when not set because polymer only notifies after a property is set."

Basically (IIRC):
 - if pageVisibility is defined, then booleans for *all* values should be also defined inside pageVisibility, otherwise sections will be erroneously hidden. 
 - if pageVisibility is undefined, then everything is visible.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/1c8d60574cb3aa2db0dc9bb96010aa52ec4bd055

commit 1c8d60574cb3aa2db0dc9bb96010aa52ec4bd055
Author: MinChen <minch@chromium.org>
Date: Thu Sep 28 00:39:09 2017

[Reland]Make it can't open wallpaper manager if wallpaper is policy controlled.

Changes,
1. Show the wallpaper setting row only for login, whitelist types and active users
(should satisfy the whole conditions at the same time).
2. Only can open the wallpaper manager if the wallpaper is not policy controlled.
3. Added wallpaper policy indicator. Show it if the wallpaper is policy
controlled.

Bug:  749755 , 768319 
Cq-Include-Trybots: master.tryserver.chromium.linux:closure_compilation
Change-Id: I07ffb372bf511411188b847c969cdc2341658bfa
Reviewed-on: https://chromium-review.googlesource.com/683221
Reviewed-by: Steven Bennetts <stevenjb@chromium.org>
Reviewed-by: Xiaoqian Dai <xdai@chromium.org>
Commit-Queue: min c <minch@chromium.org>
Cr-Commit-Position: refs/heads/master@{#504820}
[modify] https://crrev.com/1c8d60574cb3aa2db0dc9bb96010aa52ec4bd055/chrome/browser/resources/settings/appearance_page/appearance_browser_proxy.js
[modify] https://crrev.com/1c8d60574cb3aa2db0dc9bb96010aa52ec4bd055/chrome/browser/resources/settings/appearance_page/appearance_page.html
[modify] https://crrev.com/1c8d60574cb3aa2db0dc9bb96010aa52ec4bd055/chrome/browser/resources/settings/appearance_page/appearance_page.js
[modify] https://crrev.com/1c8d60574cb3aa2db0dc9bb96010aa52ec4bd055/chrome/browser/resources/settings/page_visibility.js
[modify] https://crrev.com/1c8d60574cb3aa2db0dc9bb96010aa52ec4bd055/chrome/browser/resources/settings/settings_menu/settings_menu.html
[modify] https://crrev.com/1c8d60574cb3aa2db0dc9bb96010aa52ec4bd055/chrome/browser/ui/webui/settings/appearance_handler.cc
[modify] https://crrev.com/1c8d60574cb3aa2db0dc9bb96010aa52ec4bd055/chrome/browser/ui/webui/settings/appearance_handler.h
[modify] https://crrev.com/1c8d60574cb3aa2db0dc9bb96010aa52ec4bd055/chrome/test/data/webui/settings/appearance_page_test.js
[modify] https://crrev.com/1c8d60574cb3aa2db0dc9bb96010aa52ec4bd055/chrome/test/data/webui/settings/settings_main_test.js
[modify] https://crrev.com/1c8d60574cb3aa2db0dc9bb96010aa52ec4bd055/chrome/test/data/webui/settings/settings_menu_test.js

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/5e5407114f7169b3f14aae42b02fa8835da7604e

commit 5e5407114f7169b3f14aae42b02fa8835da7604e
Author: MinChen <minch@chromium.org>
Date: Fri Oct 13 01:04:39 2017

[Merge to M62][Reland]Make it can't open wallpaper manager if wallpaper is policy controlled.

TBR=minch@chromium.org

Changes,
1. Show the wallpaper setting row only for login, whitelist types and active users
(should satisfy the whole conditions at the same time).
2. Only can open the wallpaper manager if the wallpaper is not policy controlled.
3. Added wallpaper policy indicator. Show it if the wallpaper is policy
controlled.

(cherry picked from commit 1c8d60574cb3aa2db0dc9bb96010aa52ec4bd055)

Bug:  749755 , 768319 
Cq-Include-Trybots: master.tryserver.chromium.linux:closure_compilation
Change-Id: I07ffb372bf511411188b847c969cdc2341658bfa
Reviewed-on: https://chromium-review.googlesource.com/683221
Reviewed-by: Steven Bennetts <stevenjb@chromium.org>
Reviewed-by: Xiaoqian Dai <xdai@chromium.org>
Commit-Queue: min c <minch@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#504820}
Reviewed-on: https://chromium-review.googlesource.com/717716
Reviewed-by: min c <minch@chromium.org>
Cr-Commit-Position: refs/branch-heads/3202@{#676}
Cr-Branched-From: fa6a5d87adff761bc16afc5498c3f5944c1daa68-refs/heads/master@{#499098}
[modify] https://crrev.com/5e5407114f7169b3f14aae42b02fa8835da7604e/chrome/browser/resources/settings/appearance_page/appearance_browser_proxy.js
[modify] https://crrev.com/5e5407114f7169b3f14aae42b02fa8835da7604e/chrome/browser/resources/settings/appearance_page/appearance_page.html
[modify] https://crrev.com/5e5407114f7169b3f14aae42b02fa8835da7604e/chrome/browser/resources/settings/appearance_page/appearance_page.js
[modify] https://crrev.com/5e5407114f7169b3f14aae42b02fa8835da7604e/chrome/browser/resources/settings/page_visibility.js
[modify] https://crrev.com/5e5407114f7169b3f14aae42b02fa8835da7604e/chrome/browser/resources/settings/settings_menu/settings_menu.html
[modify] https://crrev.com/5e5407114f7169b3f14aae42b02fa8835da7604e/chrome/browser/ui/webui/settings/appearance_handler.cc
[modify] https://crrev.com/5e5407114f7169b3f14aae42b02fa8835da7604e/chrome/browser/ui/webui/settings/appearance_handler.h
[modify] https://crrev.com/5e5407114f7169b3f14aae42b02fa8835da7604e/chrome/test/data/webui/settings/appearance_page_test.js
[modify] https://crrev.com/5e5407114f7169b3f14aae42b02fa8835da7604e/chrome/test/data/webui/settings/settings_main_test.js
[modify] https://crrev.com/5e5407114f7169b3f14aae42b02fa8835da7604e/chrome/test/data/webui/settings/settings_menu_test.js

10032.29.0, 63.0.3239.37