This background is only used in the non-UIRefresh tab switchers, not in the new tab grid. It will be deleted when that code is deleted after M70 branch. Is this a change we want to make before then?

(removing the Proj-UIRefresh label, since this isn't a UIRefresh feature).

Yeah we should make this change before then if possible (so that it makes it in M69).

Just to be clear: are you saying that this change *which doesn't affect the UI Refresh work* is important to get into M69? Can you explain why you feel this is a priority on a par with the UI Refresh?

I think this must be a misunderstanding. Pete probably means that we need to have the tab grid background as Solid #222222 (for UI Refresh Phase 1). Pete: Please confirm. 
Thanks.

As per offline discussion, proposed to use startup screen.

Deleted: IMG_0944.PNG 214 KB

	IMG_0944.PNG 214 KB View Download

Got it, I'll use the current startup image as the shield to hide incognito.  Thanks!

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The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/9c76065c44e6e0ced7c1c956d394633590a33057

commit 9c76065c44e6e0ced7c1c956d394633590a33057
Author: Justin Cohen <justincohen@google.com>
Date: Wed Jun 27 16:46:33 2018

[ios] Use launch screen for incognito blocker.

Bug:  852705 
Cq-Include-Trybots: luci.chromium.try:ios-simulator-full-configs;master.tryserver.chromium.mac:ios-simulator-cronet
Change-Id: I611e9625e988e077f61e71e58a7f44b741a20eab
Reviewed-on: https://chromium-review.googlesource.com/1116702
Reviewed-by: Rohit Rao <rohitrao@chromium.org>
Reviewed-by: Mark Cogan <marq@chromium.org>
Commit-Queue: Justin Cohen <justincohen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#570800}
[modify] https://crrev.com/9c76065c44e6e0ced7c1c956d394633590a33057/ios/chrome/app/application_delegate/app_state.mm

Launch screen is now displayed as incognito shield.
Verified on M69.0.3480.0 canary
iOS: 11.4, 12, 10.3.3
Device: iPad Pro, iPhoneX, iPhone5S