Here is a link to the pull request I submitted for protoc. In addition to that protobuf needs to be upreved after it lands and the gypi/gni files for handling it need to be written.

https://github.com/protocolbuffers/protobuf/pull/5349

imageloader currently uses gyp and it's probably a good idea to migrate it to gn since it's in platform2.

This issue has an owner, a component and a priority, but is still listed as untriaged or unconfirmed. By definition, this bug is triaged. Changing status to "assigned". Please reach out to me if you disagree with how I've done this.