Move duplicated internal CoreIPC message kinds to a header.
Created attachment 53111 [details]
Attachment 53111 [details] did not pass style-queue:
Failed to run "WebKitTools/Scripts/check-webkit-style" exit_code: 1
WebKit2/Platform/CoreIPC/Connection.cpp:30: Alphabetical sorting problem. [build/include_order] 
Total errors found: 1 in 6 files
If any of these errors are false positives, please file a bug against check-webkit-style.
I will fix the sorting before landing.
Landed in r57458.