Bug 208342

Summary:	Refactor the interface in media element and media player to enter/exit video fullscreen and picture-in-picture
Product:	WebKit	Reporter:	Peng Liu <peng.liu6>
Component:	Media	Assignee:	Peng Liu <peng.liu6>
Status:	NEW ---
Severity:	Normal	CC:	eric.carlson, jer.noble
Priority:	P2
Version:	WebKit Nightly Build
Hardware:	Unspecified
OS:	Unspecified

Description Peng Liu 2020-02-27 14:25:53 PST

Currently, we use setVideoFullscreenLayer(PlatformLayer* platformLayer, WTF::Function<void()>&& completionHandler) in media element and media player to enter and exit video fullscreen/picture-in-picture. When the platformLayer is valid, we will enter fullscreen/picture-in-picture. When it is a NULL pointer, we will exit fullscreen/picture-in-picture. We had better add some new interfaces to implement that.