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 113b7481478458d50ba6a42f4613bc0c0de69642..8f9f798303dac8c04af8a5bc44238d627ed5a742 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) const {
+  return URL_NEUTRAL_STATE;
+}
+
 }  // namespace net