[Webkit-unassigned] [Bug 252903] New: [ResizeObserver] The contentRect of entries is 0x0 when observing a SVG element

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=252903

            Bug ID: 252903
           Summary: [ResizeObserver] The contentRect of entries is 0x0
                    when observing a SVG element
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: CSS
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: cathiechen at igalia.com

Created attachment 465152

  --> https://bugs.webkit.org/attachment.cgi?id=465152&action=review

test-case

In ResizeObservation::computeObservedSizes(), it calls `downcast<SVGElement>(*m_target).getBoundingBox()` which returns 0x0 when the layout size of SVG is not empty.
See the attached test.

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