[webkit-changes] [WebKit/WebKit] b0a888: REGRESSION(261977 at main): TestWebKitAPI.ProcessSwap...

[Nikos Mouchtaris]

  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: b0a8888016324e0191a3569a7f65624b3d0a4b89
      https://github.com/WebKit/WebKit/commit/b0a8888016324e0191a3569a7f65624b3d0a4b89
  Author: Nikolaos Mouchtaris <nmouchtaris at apple.com>
  Date:   2023-03-24 (Fri, 24 Mar 2023)

  Changed paths:
    M Source/WebKit/UIProcess/RemoteLayerTree/RemoteLayerTreeDrawingAreaProxy.mm
    M Source/WebKit/UIProcess/RemoteLayerTree/RemoteScrollingCoordinatorProxy.cpp

  Log Message:
  -----------
  REGRESSION(261977 at main): TestWebKitAPI.ProcessSwap.ResizeWebViewDuringCrossSiteProvisionalNavigation is a constant crash
https://bugs.webkit.org/show_bug.cgi?id=254378
rdar://107161569

Reviewed by Simon Fraser.

Add null checks for ScrollingCoordinator and ScrollingTree.

* Source/WebKit/UIProcess/RemoteLayerTree/RemoteLayerTreeDrawingAreaProxy.mm:
(WebKit::RemoteLayerTreeDrawingAreaProxy::sizeDidChange):
(WebKit::RemoteLayerTreeDrawingAreaProxy::viewWillStartLiveResize):
(WebKit::RemoteLayerTreeDrawingAreaProxy::viewWillEndLiveResize):
* Source/WebKit/UIProcess/RemoteLayerTree/RemoteScrollingCoordinatorProxy.cpp:
(WebKit::RemoteScrollingCoordinatorProxy::viewWillStartLiveResize):
(WebKit::RemoteScrollingCoordinatorProxy::viewWillEndLiveResize):
(WebKit::RemoteScrollingCoordinatorProxy::viewSizeDidChange):

Canonical link: https://commits.webkit.org/262099@main