[WTF] Initialize emptyString and nullString data at compile time
Pull request: https://github.com/WebKit/WebKit/pull/491
Hmm, strange, the patch is merged by merge-queue, but this bug is not closed.
Now, I'm manually closing it. https://github.com/WebKit/WebKit/commit/961eaa8e3ee5f8357b616839993f4fad9bd1ee44
<rdar://problem/92875733>