Functionality to allow blacklist and whitelist of custom schemes

net/base/network_delegate.cc

Index: net/base/network_delegate.cc
diff --git a/net/base/network_delegate.cc b/net/base/network_delegate.cc
index ff4ee88fa0b7ea23bb1d9eee57543146dd5f7739..3e2db420eaf1a47aac8cd325b6c8cb3b13435079 100644
--- a/net/base/network_delegate.cc
+++ b/net/base/network_delegate.cc
@@ -185,4 +185,9 @@ bool NetworkDelegate::CancelURLRequestWithPolicyViolatingReferrerHeader(
       request, target_url, referrer_url);
 }
 
+NetworkDelegate::URLBlacklistState NetworkDelegate::GetURLBlacklistState(
+    const GURL& url) {
+  return URL_NEUTRAL_STATE;
+}
+
 }  // namespace net