[webkit-reviews] review requested: [Bug 215972] Clean up functions and state variables related to the picture-in-picture implementation : [Attachment 407615] WIP - add changelogs

[bugzilla-daemon at webkit.org]

Peng Liu <peng.liu6 at apple.com> has asked  for review:
Bug 215972: Clean up functions and state variables related to the
picture-in-picture implementation
https://bugs.webkit.org/show_bug.cgi?id=215972

Attachment 407615: WIP - add changelogs

https://bugs.webkit.org/attachment.cgi?id=407615&action=review