After 252266@main, it is now possible to split the implementation of RemoteImageBufferProxy and RemoteImageBuffer to source and header files since they are not templates anymore.
Pull request: https://github.com/WebKit/WebKit/pull/2490
Committed 252577@main (c1e23ae901d1): <https://commits.webkit.org/252577@main> Reviewed commits have been landed. Closing PR #2490 and removing active labels.
<rdar://problem/97217893>