Electron Releases

Description of Change

Fixes #54637. Backports the landed Chromium fix until Electron's Chromium rolls include it. Full-GC metrics attributed to a ShadowRealm currently reach NOTREACHED() in its UKM accessor and crash the renderer. Return no recorder and an invalid source ID, which the existing metrics caller handles.

Adds a crash fixture covering ordinary, ShadowRealm, and nested ShadowRealm full GC. Credits Hidekazu Kondo's original fix in #52386 and supplies the upstream change and regression coverage requested there.

Please consider backporting to 44-x-y and 45-x-y. The patch applies cleanly to the Chromium versions currently pinned by main (157.0.8091.0), Electron 44 (152.0.7977.130), and Electron 45 (156.0.8078.12).

Validation on Windows x64:

• Built the PR's native source with Electron's standard testing configuration.
• All 39 crash cases passed, including the ShadowRealm GC regression.
• Full repository lint passed on the PR source.
• Full, unfiltered npm test completed but did not pass; failures remain under investigation.
• Local validation covers Windows x64; release-branch and cross-platform validation remain pending.

Checklist

• I have built and tested this change
• I have filled out the PR description
• I have reviewed and verified the changes
• npm test passes
• tests are changed or added
• PR release notes describe the change

Release Notes

Notes: Fixed renderer crashes during garbage collection inside ShadowRealms.