Add the API for https://html.spec.whatwg.org/multipage/imagebitmap-and-animations.html#dom-createimagebitmap
<rdar://problem/35092692>
Created attachment 324381 [details] Patch
I think you need to make "ImageBitmap.h" a private header to fix the Mac/iOS builds.
Committed r223775: <https://trac.webkit.org/changeset/223775>
*** Bug 173869 has been marked as a duplicate of this bug. ***