The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/091e44cb9fb2820dcf394c0d427820710e4d3fad

commit 091e44cb9fb2820dcf394c0d427820710e4d3fad
Author: Danyao Wang <danyao@chromium.org>
Date: Thu Feb 01 16:26:57 2018

[Nav Experiment] Fix form repost detection in WKBasedNavigationManager.

This CL moves form repost detection for WKBasedNavigationManager to
in |webView:decidePolicyForNavigationAction|, where WKWebView gives a
clear signal about form reposting (WKNavigationTypeFormResubmitted).
This allows simplifying reload for WKBasedNavigationManager to directly
delegating to [WKWebView reload].

FormsTestCase now pass with WKBasedNavigationManager.

Bug: 807428,705020
Cq-Include-Trybots: master.tryserver.chromium.mac:ios-simulator-cronet;master.tryserver.chromium.mac:ios-simulator-full-configs
Change-Id: Ia35978c42b21405a3749d1764a0485cde9c805d2
Reviewed-on: https://chromium-review.googlesource.com/894892
Commit-Queue: Danyao Wang <danyao@chromium.org>
Reviewed-by: Eugene But <eugenebut@chromium.org>
Cr-Commit-Position: refs/heads/master@{#533692}
[modify] https://crrev.com/091e44cb9fb2820dcf394c0d427820710e4d3fad/ios/chrome/browser/web/forms_egtest.mm
[modify] https://crrev.com/091e44cb9fb2820dcf394c0d427820710e4d3fad/ios/testing/earl_grey/matchers.h
[modify] https://crrev.com/091e44cb9fb2820dcf394c0d427820710e4d3fad/ios/testing/earl_grey/matchers.mm
[modify] https://crrev.com/091e44cb9fb2820dcf394c0d427820710e4d3fad/ios/web/shell/test/context_menu_egtest.mm
[modify] https://crrev.com/091e44cb9fb2820dcf394c0d427820710e4d3fad/ios/web/web_state/ui/crw_web_controller.mm

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/38717484e5b93a79cbe18d9e1d8d9390990f011d

commit 38717484e5b93a79cbe18d9e1d8d9390990f011d
Author: Danyao Wang <danyao@chromium.org>
Date: Thu Feb 01 22:09:13 2018

Revert "[Nav Experiment] Fix form repost detection in WKBasedNavigationManager."

This reverts commit 091e44cb9fb2820dcf394c0d427820710e4d3fad.

Reason for revert: Suspect that this broke the tree:
https://logs.chromium.org/v/?s=chrome%2Fbb%2Finternal.bling.main%2Fiphone11-device-x64%2F2513%2F%2B%2Frecipes%2Fsteps%2Fios_web_unittests__iPhone_7_iOS_11.2.1__on_iOS-11.2.1%2F0%2Fstdout

Original change's description:
> [Nav Experiment] Fix form repost detection in WKBasedNavigationManager.
> 
> This CL moves form repost detection for WKBasedNavigationManager to
> in |webView:decidePolicyForNavigationAction|, where WKWebView gives a
> clear signal about form reposting (WKNavigationTypeFormResubmitted).
> This allows simplifying reload for WKBasedNavigationManager to directly
> delegating to [WKWebView reload].
> 
> FormsTestCase now pass with WKBasedNavigationManager.
> 
> Bug: 807428,705020
> Cq-Include-Trybots: master.tryserver.chromium.mac:ios-simulator-cronet;master.tryserver.chromium.mac:ios-simulator-full-configs
> Change-Id: Ia35978c42b21405a3749d1764a0485cde9c805d2
> Reviewed-on: https://chromium-review.googlesource.com/894892
> Commit-Queue: Danyao Wang <danyao@chromium.org>
> Reviewed-by: Eugene But <eugenebut@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#533692}

TBR=eugenebut@chromium.org,danyao@chromium.org

Change-Id: I1db11102b3df8a8c0a37610e36ca229343367c8a
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 807428, 705020
Cq-Include-Trybots: master.tryserver.chromium.mac:ios-simulator-cronet;master.tryserver.chromium.mac:ios-simulator-full-configs
Reviewed-on: https://chromium-review.googlesource.com/898164
Reviewed-by: Danyao Wang <danyao@chromium.org>
Commit-Queue: Danyao Wang <danyao@chromium.org>
Cr-Commit-Position: refs/heads/master@{#533824}
[modify] https://crrev.com/38717484e5b93a79cbe18d9e1d8d9390990f011d/ios/chrome/browser/web/forms_egtest.mm
[modify] https://crrev.com/38717484e5b93a79cbe18d9e1d8d9390990f011d/ios/testing/earl_grey/matchers.h
[modify] https://crrev.com/38717484e5b93a79cbe18d9e1d8d9390990f011d/ios/testing/earl_grey/matchers.mm
[modify] https://crrev.com/38717484e5b93a79cbe18d9e1d8d9390990f011d/ios/web/shell/test/context_menu_egtest.mm
[modify] https://crrev.com/38717484e5b93a79cbe18d9e1d8d9390990f011d/ios/web/web_state/ui/crw_web_controller.mm

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/801862cf21e7217aae758124949a9dd401f07feb

commit 801862cf21e7217aae758124949a9dd401f07feb
Author: Danyao Wang <danyao@chromium.org>
Date: Fri Feb 02 20:12:20 2018

[ios] Use ElementToDismissContextMenu in FormsTestCase.

This is a partial reland of 091e44cb9fb2820dcf394c0d427820710e4d3fad.
It splits out only the matcher change in EarlGrey tests.

The suspected test failure (ContextMenuJsTest.LinkOfTextWithCalloutNone)
is not caused by the original CL. It seems to be flaky.
It failed again after the revert:
https://luci-milo.appspot.com/buildbot/internal.bling.main/iphone11-device-x64/2532
and it failed before the CL was checked in:
https://luci-milo.appspot.com/buildbot/internal.bling.main/iphone11-device-x64/2504

Original change's description:
> [Nav Experiment] Fix form repost detection in WKBasedNavigationManager.
>
> This CL moves form repost detection for WKBasedNavigationManager to
> in |webView:decidePolicyForNavigationAction|, where WKWebView gives a
> clear signal about form reposting (WKNavigationTypeFormResubmitted).
> This allows simplifying reload for WKBasedNavigationManager to directly
> delegating to [WKWebView reload].
>
> FormsTestCase now pass with WKBasedNavigationManager.
>
> Bug: 807428,705020
> Cq-Include-Trybots: master.tryserver.chromium.mac:ios-simulator-cronet;master.tryserver.chromium.mac:ios-simulator-full-configs
> Change-Id: Ia35978c42b21405a3749d1764a0485cde9c805d2
> Reviewed-on: https://chromium-review.googlesource.com/894892
> Commit-Queue: Danyao Wang <danyao@chromium.org>
> Reviewed-by: Eugene But <eugenebut@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#533692}

Bug: 705020
Change-Id: I0c5b5f893bc64eaa61538c7a75a78799ac422993
Cq-Include-Trybots: master.tryserver.chromium.mac:ios-simulator-cronet;master.tryserver.chromium.mac:ios-simulator-full-configs
Reviewed-on: https://chromium-review.googlesource.com/898263
Reviewed-by: Eugene But <eugenebut@chromium.org>
Commit-Queue: Danyao Wang <danyao@chromium.org>
Cr-Commit-Position: refs/heads/master@{#534132}
[modify] https://crrev.com/801862cf21e7217aae758124949a9dd401f07feb/ios/chrome/browser/web/forms_egtest.mm
[modify] https://crrev.com/801862cf21e7217aae758124949a9dd401f07feb/ios/testing/earl_grey/matchers.h
[modify] https://crrev.com/801862cf21e7217aae758124949a9dd401f07feb/ios/testing/earl_grey/matchers.mm
[modify] https://crrev.com/801862cf21e7217aae758124949a9dd401f07feb/ios/web/shell/test/context_menu_egtest.mm

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/c1fa00527100f5045c95bcc62bdf74c7183951fa

commit c1fa00527100f5045c95bcc62bdf74c7183951fa
Author: Danyao Wang <danyao@chromium.org>
Date: Fri Feb 02 21:46:54 2018

Reland "[Nav Experiment] Fix form repost detection in WKBasedNavigationManager."

This is a reland of 091e44cb9fb2820dcf394c0d427820710e4d3fad.

It fixes the regression in
WebUITestCase/testChromeURLBackAndForwardAndReloadNavigation. WebUI
needs special handling in reload because calling [WKWebView -reload]
simply reloads WKWebView.URL (which is an app-specific URL in this case)
and results in a provisional load failure.

The other suspected test failure
(ContextMenuJsTest.LinkOfTextWithCalloutNone) is not caused by the
original CL. It seems to be flaky. It failed again after the revert:
https://luci-milo.appspot.com/buildbot/internal.bling.main/iphone11-device-x64/2532
and it failed before the original CL was checked in:
https://luci-milo.appspot.com/buildbot/internal.bling.main/iphone11-device-x64/2504

Original change's description:
> [Nav Experiment] Fix form repost detection in WKBasedNavigationManager.
>
> This CL moves form repost detection for WKBasedNavigationManager to
> in |webView:decidePolicyForNavigationAction|, where WKWebView gives a
> clear signal about form reposting (WKNavigationTypeFormResubmitted).
> This allows simplifying reload for WKBasedNavigationManager to directly
> delegating to [WKWebView reload].
>
> FormsTestCase now pass with WKBasedNavigationManager.
>
> Bug: 807428,705020
> Cq-Include-Trybots: master.tryserver.chromium.mac:ios-simulator-cronet;master.tryserver.chromium.mac:ios-simulator-full-configs
> Change-Id: Ia35978c42b21405a3749d1764a0485cde9c805d2
> Reviewed-on: https://chromium-review.googlesource.com/894892
> Commit-Queue: Danyao Wang <danyao@chromium.org>
> Reviewed-by: Eugene But <eugenebut@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#533692}t

Bug: 807428
Cq-Include-Trybots: master.tryserver.chromium.mac:ios-simulator-cronet;master.tryserver.chromium.mac:ios-simulator-full-configs
Change-Id: If0bb1c907472ec402931c69f347c9259907c4f28
Reviewed-on: https://chromium-review.googlesource.com/899916
Reviewed-by: Eugene But <eugenebut@chromium.org>
Commit-Queue: Danyao Wang <danyao@chromium.org>
Cr-Commit-Position: refs/heads/master@{#534163}
[modify] https://crrev.com/c1fa00527100f5045c95bcc62bdf74c7183951fa/ios/web/web_state/ui/crw_web_controller.mm