[webkit-changes] [WebKit/WebKit] dd64fd: Make the backing sharing logging more readable

[Simon Fraser]

  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: dd64fd7b0ea15382ff4223c17e2a63dfb5451b26
      https://github.com/WebKit/WebKit/commit/dd64fd7b0ea15382ff4223c17e2a63dfb5451b26
  Author: Simon Fraser <simon.fraser at apple.com>
  Date:   2024-02-01 (Thu, 01 Feb 2024)

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

  Log Message:
  -----------
  Make the backing sharing logging more readable
https://bugs.webkit.org/show_bug.cgi?id=268528
rdar://122066519

Reviewed by Matt Woodrow.

Fix the logging indentation to it's easier to match it with the paint-order hierarchy.
Always print the layer address first.
Simplify the `BackingSharingState::Provider` output.

* Source/WebCore/rendering/RenderLayerCompositor.cpp:
(WebCore::RenderLayerCompositor::computeCompositingRequirements):
(WebCore::RenderLayerCompositor::traverseUnchangedSubtree):
(WebCore::RenderLayerCompositor::updateBackingSharingBeforeDescendantTraversal):
(WebCore::RenderLayerCompositor::updateBackingSharingAfterDescendantTraversal):
(WebCore::operator<<):
* Source/WebCore/rendering/RenderLayerCompositor.h:

Canonical link: https://commits.webkit.org/273940@main