Olli Pettay 4d366e1861 Bug 1723282, let nonbfcacheable page update layout history state when the new page is coming from the bfcache, r=peterv
The fix let's ContentParent::RecvSynchronizeLayoutHistoryState update the layout history state.

Using an existing test to launch a subtest for this. Hopefully the description of the test helps with reviewing it.
(These BroadcastChannel based tests can be hard to follow.)

Differential Revision: https://phabricator.services.mozilla.com/D122376
2021-08-30 19:50:05 +00:00
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