Electron Releases

Description of Change

There was a crash in third_party/blink/renderer/core/css/properties/longhands/longhands_custom.cc from parsing the -electron-corner-smoothing CSS property when the property was added to a stylesheet with no associated document. To resolve this, I changed the feature gating to use Blink's built-in runtime feature gating instead. As a result, I was able to cut out a majority of the patch that was just for plumbing the web preference. There is an insignificant API change for how the feature is disabled.

Checklist

• PR description included and stakeholders cc'd
• npm test passes
• tests are changed or added
• relevant API documentation, tutorials, and examples are updated and follow the documentation style guide
• PR release notes describe the change in a way relevant to app developers, and are capitalized, punctuated, and past tense.

Release Notes

Notes: Fixed a crash when adding the -electron-corner-smoothing CSS rule to a stylesheet with no associated document.