[webkit-reviews] review requested: [Bug 163021] Support onbeforeinput event handling for the new InputEvent spec : [Attachment 290858] First pass

[bugzilla-daemon at webkit.org]

Wenson Hsieh <wenson_hsieh at apple.com> has asked  for review:
Bug 163021: Support onbeforeinput event handling for the new InputEvent spec
https://bugs.webkit.org/show_bug.cgi?id=163021

Attachment 290858: First pass

https://bugs.webkit.org/attachment.cgi?id=290858&action=review