[webkit-reviews] review requested: [Bug 73883] Give embedders a chance to handle postMessage calls : [Attachment 118618] Patch

[bugzilla-daemon at webkit.org]

Karl Koscher <supersat at chromium.org> has asked	for review:
Bug 73883: Give embedders a chance to handle postMessage calls
https://bugs.webkit.org/show_bug.cgi?id=73883

Attachment 118618: Patch
https://bugs.webkit.org/attachment.cgi?id=118618&action=review