[webkit-reviews] review requested: [Bug 128915] Add type-checked casts for StyleImage and subclasses : [Attachment 224390] Patch v1

[bugzilla-daemon at webkit.org]

David Kilzer (:ddkilzer) <ddkilzer at webkit.org> has asked  for review:
Bug 128915: Add type-checked casts for StyleImage and subclasses
https://bugs.webkit.org/show_bug.cgi?id=128915

Attachment 224390: Patch v1
https://bugs.webkit.org/attachment.cgi?id=224390&action=review