The m_baseBackgroundColor is initially white for a transparent WebView. <rdar://problem/47005594>
Created attachment 367556 [details] Patch
Comment on attachment 367556 [details] Patch Clearing flags on attachment: 367556 Committed r244355: <https://trac.webkit.org/changeset/244355>
All reviewed patches have been landed. Closing bug.
*** Bug 198042 has been marked as a duplicate of this bug. ***