Do not disable Data Reduction Proxy on VPN.

components/data_reduction_proxy/core/common/data_reduction_proxy_params.cc

Index: components/data_reduction_proxy/core/common/data_reduction_proxy_params.cc
diff --git a/components/data_reduction_proxy/core/common/data_reduction_proxy_params.cc b/components/data_reduction_proxy/core/common/data_reduction_proxy_params.cc
index 3951d091bd21914277ca1b1628b01f660f0c491e..ce22d525fcf2ad19ba9d964867b526b16cf53fc1 100644
--- a/components/data_reduction_proxy/core/common/data_reduction_proxy_params.cc
+++ b/components/data_reduction_proxy/core/common/data_reduction_proxy_params.cc
@@ -130,6 +130,12 @@ std::string DataReductionProxyParams::GetQuicFieldTrialName() {
 }
 
 // static
+bool DataReductionProxyParams::IsIncludedInUseDataSaverOnVPNFieldTrial() {
+  return FieldTrialList::FindFullName("DataReductionProxyUseDataSaverOnVPN") ==
+         kEnabled;
+}
+
+// static
 bool DataReductionProxyParams::IsConfigClientEnabled() {
   return base::CommandLine::ForCurrentProcess()->HasSwitch(
       data_reduction_proxy::switches::kEnableDataReductionProxyConfigClient);