[Webkit-unassigned] [Bug 189663] REGRESSION (PSON): White or Black flash occurs when process swapping on navigation on Mac

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=189663

--- Comment #16 from Chris Dumez <cdumez at apple.com> ---
Comment on attachment 350021
  --> https://bugs.webkit.org/attachment.cgi?id=350021
patch

View in context: https://bugs.webkit.org/attachment.cgi?id=350021&action=review

> Source/WebKit/UIProcess/WebPageProxy.cpp:802
> +        pageClient().didRelaunchProcess();

The crashes are likely caused by not calling pageClient().didRelaunchProcess() anymore in case of process swap. The PageClient needs to be notified that the WebPageProxy's process has changed. Otherwise, it cannot do the necessary updates and things like SmartMagnificationController keep trying to receive IPC from the old process instead of the new one.

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