WebKit/Source/Platform/IPC should be testable with C++ unit tests
<rdar://problem/98717673>
Pull request: https://github.com/WebKit/WebKit/pull/3360
Committed 254030@main (e251ba5a08e4): <https://commits.webkit.org/254030@main> Reviewed commits have been landed. Closing PR #3360 and removing active labels.
Re-opening for pull request https://github.com/WebKit/WebKit/pull/3939
Committed 254080@main (a85b766e565b): <https://commits.webkit.org/254080@main> Reviewed commits have been landed. Closing PR #3939 and removing active labels.