REGRESSION(r266634): [macOS release] 4 layout tests became flaky failures

[Ryan Haddad]

The following layout tests have become flaky failures on macOS release bots:

compositing/tiling/tiled-mask-inwindow.html
fast/events/page-visibility-iframe-move-test.html
pageoverlay/overlay-remove-reinsert-view.html
tiled-drawing/tiled-backing-in-window.html

https://results.webkit.org/?suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&test=compositing%2Ftiling%2Ftiled-mask-inwindow.html&test=fast%2Fevents%2Fpage-visibility-iframe-move-test.html&test=pageoverlay%2Foverlay-remove-reinsert-view.html&test=tiled-drawing%2Ftiled-backing-in-window.html

[Ryan Haddad]

I was able to reproduce one of the failures with the following on r266634:
run-webkit-tests compositing/tiling/tiled-mask-inwindow.html --iterations 100 --exit-after-n-failures 1

I could not reproduce with r266629.

[Radar WebKit Bug Importer]

<rdar://problem/68515242>

[Ryan Haddad]

Not sure if this is fixed by the patch in https://bugs.webkit.org/show_bug.cgi?id=216261

[Sihui Liu]

Created attachment 408312 [details]
Patch

[Sihui Liu]

Created attachment 408403 [details]
Patch

[Darin Adler]

Comment on attachment 408403 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=408403&action=review

> Source/WebKit/ChangeLog:10
> +        transation is committed in UI process. To make sure web process picks up the changes, we need to invoke the 

typo: "transition"

> Source/WebKit/UIProcess/API/Cocoa/WKWebViewPrivate.h:357
> +- (void)_doAfterActivityStateUpdate:(void (^)(void))completionHandler WK_API_AVAILABLE(macos(WK_MAC_TBA), ios(WK_IOS_TBA));

Why is this not in WKWebViewPrivateForTesting.h?

[Darin Adler]

Comment on attachment 408403 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=408403&action=review

> LayoutTests/fast/events/page-visibility-iframe-move-test.html:58
> +    debug("VisibilityChanage event is received");

typo: "VisibilityChange"

[Sihui Liu]

Comment on attachment 408403 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=408403&action=review

>> Source/WebKit/UIProcess/API/Cocoa/WKWebViewPrivate.h:357
>> +- (void)_doAfterActivityStateUpdate:(void (^)(void))completionHandler WK_API_AVAILABLE(macos(WK_MAC_TBA), ios(WK_IOS_TBA));
> 
> Why is this not in WKWebViewPrivateForTesting.h?

ah, will move it to WKWebViewPrivateForTesting.h!

[Sihui Liu]

Created attachment 408415 [details]
Patch

[Tim Horton]

Comment on attachment 408415 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=408415&action=review

> Source/WebKit/UIProcess/API/Cocoa/WKWebViewPrivateForTesting.h:79
> +- (void)_doAfterActivityStateUpdate:(void (^)(void))completionHandler;

Nice!

[EWS]

Committed r266847: <https://trac.webkit.org/changeset/266847>

All reviewed patches have been landed. Closing bug and clearing flags on attachment 408415 [details].