[webkit-changes] [WebKit/WebKit] a2e00c: Null check the ScrollingCoordinator in a few places

[Simon Fraser]

  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: a2e00ce3745e2380bb8748079cb80ca8d3ac8752
      https://github.com/WebKit/WebKit/commit/a2e00ce3745e2380bb8748079cb80ca8d3ac8752
  Author: Simon Fraser <simon.fraser at apple.com>
  Date:   2024-01-02 (Tue, 02 Jan 2024)

  Changed paths:
    M Source/WebCore/rendering/RenderLayerCompositor.cpp

  Log Message:
  -----------
  Null check the ScrollingCoordinator in a few places
https://bugs.webkit.org/show_bug.cgi?id=267002
rdar://116427384

Reviewed by Alan Baradlay.

We dereference the return value of RenderLayerCompositor::scrollingCoordinator() in
a couple of places without null-checking, so fix that.

* Source/WebCore/rendering/RenderLayerCompositor.cpp:
(WebCore::RenderLayerCompositor::attachScrollingNode):
(WebCore::RenderLayerCompositor::detachScrollCoordinatedLayer):

Canonical link: https://commits.webkit.org/272588@main