RESOLVED FIXED315606
[BFCache] Add ShouldRestoreFromBackForwardCache and wasFromBackForwardCache plumbing 
https://bugs.webkit.org/show_bug.cgi?id=315606
Summary [BFCache] Add ShouldRestoreFromBackForwardCache and wasFromBackForwardCache p...
Basuke Suzuki
Reported 2026-05-26 14:57:55 PDT
Preparation for UIP-driven BFCache restore (bug 313657). No behavior change. Adds a ShouldRestoreFromBackForwardCache enum and threads it as a parameter from Page::goToItem through HistoryController and FrameLoader down to continueLoadAfterNavigationPolicy, so the UIProcess can later direct the WebProcess to perform a BFCache restore even when the WebProcess-side cache probe is racing. All current callers pass ShouldRestoreFromBackForwardCache::No; continueLoadAfterNavigationPolicy does not consult the new argument yet. Also adds wasFromBackForwardCache to Messages::WebPageProxy::DidCommitLoadForFrame, sourced in WebProcess from FrameLoader::loadingFromCachedPage() (newly exposed as a public accessor). The UIProcess receiver carries the value through commit dispatchers but does not act on it yet.
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Add attachment proposed patch, testcase, etc.
Basuke Suzuki
Comment 1 2026-05-26 16:04:00 PDT
<rdar://problem/177985347>
Basuke Suzuki
Comment 2 2026-05-26 16:04:17 PDT
Pull request: https://github.com/WebKit/WebKit/pull/65724
EWS
Comment 3 2026-05-26 20:26:30 PDT
Committed 313940@main (e97a07211a62): <https://commits.webkit.org/313940@main> Reviewed commits have been landed. Closing PR #65724 and removing active labels.
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