Add initial CertVerifyProcBuiltin.

net/cert/internal/trust_store_in_memory.cc

Index: net/cert/internal/trust_store_in_memory.cc
diff --git a/net/cert/internal/trust_store_in_memory.cc b/net/cert/internal/trust_store_in_memory.cc
index 3f94b6f0c49baffc566dbf07d6c222e048d98c4c..a3e9e3eea07497f7f49da3e881a6659f2f9efc43 100644
--- a/net/cert/internal/trust_store_in_memory.cc
+++ b/net/cert/internal/trust_store_in_memory.cc
@@ -27,4 +27,12 @@ void TrustStoreInMemory::FindTrustAnchorsForCert(
     matches->push_back(it->second);
 }
 
+bool TrustStoreInMemory::Contains(const TrustAnchor* anchor) const {
+  for (const auto& it : anchors_) {
+    if (anchor == it.second.get())
+      return true;
+  }
+  return false;
+}
+
 }  // namespace net