1) Navigate to https://clusterfuzz.com/v2/testcase-detail/5184212912832512?noredirect=1
2) Click on DOCUMENTATION https://code.google.com/p/chromium/wiki/IPCFuzzer

The link is broken.
I think is should be:
https://chromium.googlesource.com/chromium/src/+/HEAD/docs/ipc_fuzzer.md instead.