tree 8dcf8d03c19ec590a480200b4427a9e39a4c753a
parent 2d439d24f3618b89e071dfeccf07adeb3a6ec694
author cdumez@apple.com <cdumez@apple.com@268f45cc-cd09-0410-ab3c-d52691b4dbfc> 1571374910 +0000
committer cdumez@apple.com <cdumez@apple.com@268f45cc-cd09-0410-ab3c-d52691b4dbfc> 1571374910 +0000

Don't put pages that have not reached the non-visually empty layout milestone in the back/forward cache
https://bugs.webkit.org/show_bug.cgi?id=203108
<rdar://problem/56375671>

Reviewed by Geoff Garen.

Source/WebCore:

We don't want to go back to a visually empty page on back/forward navigation.

* history/BackForwardCache.cpp:
(WebCore::canCacheFrame):
* page/DiagnosticLoggingKeys.cpp:
(WebCore::DiagnosticLoggingKeys::visuallyEmptyKey):
* page/DiagnosticLoggingKeys.h:

LayoutTests:

* http/tests/navigation/page-cache-pending-load.html:
Tweak test to add the stylesheet to the body instead of the head since a document
with a pending stylesheet before the body qualifies as visually empty. The test
would be flaky otherwise.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@251275 268f45cc-cd09-0410-ab3c-d52691b4dbfc