Add information on the requirements for a new Chromium port.
Review-Url: https://codereview.chromium.org/2909733002
Cr-Commit-Position: refs/heads/master@{#475553}
diff --git a/build/build_config.h b/build/build_config.h
index 30c5783b..8e5fcd7d 100644
--- a/build/build_config.h
+++ b/build/build_config.h
@@ -66,6 +66,8 @@
#else
#error Please add support for your platform in build/build_config.h
#endif
+// NOTE: Adding a new port? Please follow
+// https://chromium.googlesource.com/chromium/src/+/master/docs/new_port_policy.md
#if defined(USE_OPENSSL_CERTS) && defined(USE_NSS_CERTS)
#error Cannot use both OpenSSL and NSS for certificates
