The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/6943fdf89cf1e7a81b858df0d2f953ff127b506e

commit 6943fdf89cf1e7a81b858df0d2f953ff127b506e
Author: Eugene But <eugenebut@google.com>
Date: Thu Jun 07 22:27:32 2018

Use -userIsInteracting for user gesture detection if voice over is off.

Notable changes:
 - updated testLinkWithBlankTargetWithoutUserGesture to execute script
   without user gesture
 - removed NavigationActionInitiationType::kScriptInitiated because there
   is no way to tell if action was initiated by the script (coordinates or
   SyntheticClickType can be 0 for valid link clicks).
 - Updated webView:createWebViewWithConfiguration: to use
   GetNavigationActionInitiationTypeWithVoiceOverOn, because there is no
   need to inspect action.description when Voice over is Off.
   -userIsInteracting can give false positives for link clicks, which is
   ok. window.open also have these false positives, so if the page wants
   to open a popup, it can exploit window.open.

Bug:  849749 
Cq-Include-Trybots: luci.chromium.try:ios-simulator-full-configs;master.tryserver.chromium.mac:ios-simulator-cronet
Change-Id: I8c179c9df2d6bce3253e46272c2f14e0eb6224bc
Reviewed-on: https://chromium-review.googlesource.com/1087389
Commit-Queue: Eugene But <eugenebut@chromium.org>
Reviewed-by: Mohammad Refaat <mrefaat@chromium.org>
Cr-Commit-Position: refs/heads/master@{#565442}
[modify] https://crrev.com/6943fdf89cf1e7a81b858df0d2f953ff127b506e/ios/chrome/browser/web/window_open_by_dom_egtest.mm
[modify] https://crrev.com/6943fdf89cf1e7a81b858df0d2f953ff127b506e/ios/web/web_state/ui/crw_web_controller.mm
[modify] https://crrev.com/6943fdf89cf1e7a81b858df0d2f953ff127b506e/ios/web/web_state/ui/wk_navigation_action_util.h
[modify] https://crrev.com/6943fdf89cf1e7a81b858df0d2f953ff127b506e/ios/web/web_state/ui/wk_navigation_action_util.mm
[modify] https://crrev.com/6943fdf89cf1e7a81b858df0d2f953ff127b506e/ios/web/web_state/ui/wk_navigation_action_util_unittest.mm

This bug requires manual review: M68 has already been promoted to the beta branch, so this requires manual review
Please contact the milestone owner if you have questions.
Owners: cmasso@(Android), kariahda@(iOS), bhthompson@(ChromeOS), abdulsyed@(Desktop)

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

Let's get canary verification for this please.

+lindsayw@ for visibility

Not completely fixed. Popup blocker is still displayed if the device has VoiceOver enabled.
Tested on iPhone6S, iOS11.4, M69.0.3455.0 canary

Shrikhang, do you see a popup blocker with VoiceOver enabled in M67?

Yes

Thanks. Please file a separate bug for Voice Over. That's a separate problem, which we can't actually fix. 

Verified on chrome canary version on iPhone 8 and iPad 2018 with iOS 11.4, following the steps mentioned in comment #0.  Article is opened in a new window.  Looks good.

Approved!

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/27813b0c26e46ed1906d9cab2d379c3b9c245961

commit 27813b0c26e46ed1906d9cab2d379c3b9c245961
Author: Eugene But <eugenebut@google.com>
Date: Tue Jun 12 15:41:03 2018

Use -userIsInteracting for user gesture detection if voice over is off.

Notable changes:
 - updated testLinkWithBlankTargetWithoutUserGesture to execute script
   without user gesture
 - removed NavigationActionInitiationType::kScriptInitiated because there
   is no way to tell if action was initiated by the script (coordinates or
   SyntheticClickType can be 0 for valid link clicks).
 - Updated webView:createWebViewWithConfiguration: to use
   GetNavigationActionInitiationTypeWithVoiceOverOn, because there is no
   need to inspect action.description when Voice over is Off.
   -userIsInteracting can give false positives for link clicks, which is
   ok. window.open also have these false positives, so if the page wants
   to open a popup, it can exploit window.open.

TBR=eugenebut@google.com

(cherry picked from commit 6943fdf89cf1e7a81b858df0d2f953ff127b506e)

Bug:  849749 
Cq-Include-Trybots: luci.chromium.try:ios-simulator-full-configs;master.tryserver.chromium.mac:ios-simulator-cronet
Change-Id: I8c179c9df2d6bce3253e46272c2f14e0eb6224bc
Reviewed-on: https://chromium-review.googlesource.com/1087389
Commit-Queue: Eugene But <eugenebut@chromium.org>
Reviewed-by: Mohammad Refaat <mrefaat@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#565442}
Reviewed-on: https://chromium-review.googlesource.com/1097229
Reviewed-by: Eugene But <eugenebut@chromium.org>
Cr-Commit-Position: refs/branch-heads/3440@{#301}
Cr-Branched-From: 010ddcfda246975d194964ccf20038ebbdec6084-refs/heads/master@{#561733}
[modify] https://crrev.com/27813b0c26e46ed1906d9cab2d379c3b9c245961/ios/chrome/browser/web/window_open_by_dom_egtest.mm
[modify] https://crrev.com/27813b0c26e46ed1906d9cab2d379c3b9c245961/ios/web/web_state/ui/crw_web_controller.mm
[modify] https://crrev.com/27813b0c26e46ed1906d9cab2d379c3b9c245961/ios/web/web_state/ui/wk_navigation_action_util.h
[modify] https://crrev.com/27813b0c26e46ed1906d9cab2d379c3b9c245961/ios/web/web_state/ui/wk_navigation_action_util.mm
[modify] https://crrev.com/27813b0c26e46ed1906d9cab2d379c3b9c245961/ios/web/web_state/ui/wk_navigation_action_util_unittest.mm

Srikanth, re: comment 10 once filed can you please link to the separately filed bug from here just for record?

http://crbug/852425 is reported for voice over issue.

Thank you!

Verified in 68.0.3440.30 Beta in iPad Air(iOS 11.3.1), iPhone 7(iOS 11.4)

Articles opens up as expected no block popups infobar displayed, looks good.