[webkit-reviews] review requested: [Bug 173832] Refactor drag start codepaths to plumb a DragItem to client layers : [Attachment 313841] First pass

[bugzilla-daemon at webkit.org]

Wenson Hsieh <wenson_hsieh at apple.com> has asked  for review:
Bug 173832: Refactor drag start codepaths to plumb a DragItem to client layers
https://bugs.webkit.org/show_bug.cgi?id=173832

Attachment 313841: First pass

https://bugs.webkit.org/attachment.cgi?id=313841&action=review