Looks like Mirror/SignIn issue.

This is probably a problem with the way the reconcilor works on iOS 11. I'm assigning this to Jerome as he is working on sign-in for iOS now.

Jerome: This bug is a good moment to get familiarized with the AccountReconcilor and how that works for Chrome iOS. Let's chat about this before you start on it.

It looks like this is a stable blocker for M61, so this is higher priority than starting on Dice.

 jlebel@ do you have update on this?

I'm working on it.

This is probably related to  crbug.com/739390  and rdar://33184203.

WKWebView in iOS 11 should always be part of view hierarchy.

We landed a workaround for  crbug.com/739390 

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/28dfaa0da2e4ca268f6bbec2ede88c8a8c1933f8

commit 28dfaa0da2e4ca268f6bbec2ede88c8a8c1933f8
Author: Jérôme Lebel <jlebel@chromium.org>
Date: Thu Jul 20 12:46:32 2017

iOS 11 WKWebView load is broken

In iOS 11, WKWebView has issues (time outs) when loading request if the
view is not part of the hierarchy. The WKWebView is now added to the
hierarchy but off screen.

Bug:  738435 ,  739390 
Change-Id: Ica8584c30a24a11c04658774bd22a77273a93514
Reviewed-on: https://chromium-review.googlesource.com/577807
Commit-Queue: Jérôme Lebel <jlebel@chromium.org>
Reviewed-by: Rohit Rao <rohitrao@chromium.org>
Reviewed-by: Mihai Sardarescu <msarda@chromium.org>
Reviewed-by: Eugene But <eugenebut@chromium.org>
Reviewed-by: Justin Cohen <justincohen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#488213}
[modify] https://crrev.com/28dfaa0da2e4ca268f6bbec2ede88c8a8c1933f8/components/signin/ios/browser/account_consistency_service.mm

[Auto-generated comment by a script] We noticed that this issue is targeted for M-61; it appears the fix may have landed after branch point, meaning a merge might be required. Please confirm if a merge is required here - if so add Merge-Request-61 label, otherwise remove Merge-TBD label. Thanks.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/40de2a142623043bb744f808ca5652340b2c00b8

commit 40de2a142623043bb744f808ca5652340b2c00b8
Author: Jérôme Lebel <jlebel@chromium.org>
Date: Mon Jul 31 11:27:05 2017

Revert "iOS 11 WKWebView load is broken"

This reverts commit 28dfaa0da2e4ca268f6bbec2ede88c8a8c1933f8.

Reason for revert: This appears fixed in Xcode 9 beta 4.

Original change's description:
> iOS 11 WKWebView load is broken
> 
> In iOS 11, WKWebView has issues (time outs) when loading request if the
> view is not part of the hierarchy. The WKWebView is now added to the
> hierarchy but off screen.
> 
> Bug:  738435 ,  739390 
> Change-Id: Ica8584c30a24a11c04658774bd22a77273a93514
> Reviewed-on: https://chromium-review.googlesource.com/577807
> Commit-Queue: Jérôme Lebel <jlebel@chromium.org>
> Reviewed-by: Rohit Rao <rohitrao@chromium.org>
> Reviewed-by: Mihai Sardarescu <msarda@chromium.org>
> Reviewed-by: Eugene But <eugenebut@chromium.org>
> Reviewed-by: Justin Cohen <justincohen@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#488213}

TBR=rohitrao@chromium.org,msarda@chromium.org,justincohen@chromium.org,eugenebut@chromium.org,jlebel@chromium.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug:  738435 ,  739390 
Change-Id: Ic57820325fef5ac86b93b4f02f449b97f0b458e0
Reviewed-on: https://chromium-review.googlesource.com/591671
Reviewed-by: Justin Cohen <justincohen@chromium.org>
Reviewed-by: Benoit Zanotti <bzanotti@chromium.org>
Reviewed-by: Jérôme Lebel <jlebel@chromium.org>
Reviewed-by: Eugene But <eugenebut@chromium.org>
Commit-Queue: Jérôme Lebel <jlebel@chromium.org>
Cr-Commit-Position: refs/heads/master@{#490743}
[modify] https://crrev.com/40de2a142623043bb744f808ca5652340b2c00b8/components/signin/ios/browser/account_consistency_service.mm

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/731e8f89b4d1db6fecc2384c3825e95c4d8f206d

commit 731e8f89b4d1db6fecc2384c3825e95c4d8f206d
Author: Jérôme Lebel <jlebel@chromium.org>
Date: Tue Aug 01 17:43:49 2017

Revert "iOS 11 WKWebView load is broken"

This reverts commit 28dfaa0da2e4ca268f6bbec2ede88c8a8c1933f8.

Reason for revert: This appears fixed in Xcode 9 beta 4.

Original change's description:
> iOS 11 WKWebView load is broken
>
> In iOS 11, WKWebView has issues (time outs) when loading request if the
> view is not part of the hierarchy. The WKWebView is now added to the
> hierarchy but off screen.
>
> Bug:  738435 ,  739390 
> Change-Id: Ica8584c30a24a11c04658774bd22a77273a93514
> Reviewed-on: https://chromium-review.googlesource.com/577807
> Commit-Queue: Jérôme Lebel <jlebel@chromium.org>
> Reviewed-by: Rohit Rao <rohitrao@chromium.org>
> Reviewed-by: Mihai Sardarescu <msarda@chromium.org>
> Reviewed-by: Eugene But <eugenebut@chromium.org>
> Reviewed-by: Justin Cohen <justincohen@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#488213}

TBR=eugenebut@chromium.org, jlebel@chromium.org, justincohen@chromium.org, msarda@chromium.org, rohitrao@chromium.org


(cherry picked from commit 40de2a142623043bb744f808ca5652340b2c00b8)

Bug:  750739 ,  738435 ,  739390 
Change-Id: Ic57820325fef5ac86b93b4f02f449b97f0b458e0
Reviewed-on: https://chromium-review.googlesource.com/591671
Reviewed-by: Justin Cohen <justincohen@chromium.org>
Reviewed-by: Benoit Zanotti <bzanotti@chromium.org>
Reviewed-by: Jérôme Lebel <jlebel@chromium.org>
Reviewed-by: Eugene But <eugenebut@chromium.org>
Commit-Queue: Jérôme Lebel <jlebel@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#490743}
Reviewed-on: https://chromium-review.googlesource.com/596308
Cr-Commit-Position: refs/branch-heads/3163@{#211}
Cr-Branched-From: ff259bab28b35d242e10186cd63af7ed404fae0d-refs/heads/master@{#488528}
[modify] https://crrev.com/731e8f89b4d1db6fecc2384c3825e95c4d8f206d/components/signin/ios/browser/account_consistency_service.mm

Verified in 61.0.3163.67 beta, iPhone 7 iOS11, 
The user is logged in to gmail with the chrome sign in account.
Looks good.