Add a flag to disable the check if proxy is core data saver proxy

components/data_reduction_proxy/core/common/data_reduction_proxy_switches.cc

Index: components/data_reduction_proxy/core/common/data_reduction_proxy_switches.cc
diff --git a/components/data_reduction_proxy/core/common/data_reduction_proxy_switches.cc b/components/data_reduction_proxy/core/common/data_reduction_proxy_switches.cc
index 53fa471e5508baef27a2e383c3c48983b1d19d78..caa5fa3a2b8de6dc28247a1f58a44c7ffbfacf90 100644
--- a/components/data_reduction_proxy/core/common/data_reduction_proxy_switches.cc
+++ b/components/data_reduction_proxy/core/common/data_reduction_proxy_switches.cc
@@ -89,5 +89,9 @@ const char kEnableDataReductionProxyLitePage[] =
 const char kEnableDataReductionProxyForcePingback[] =
     "enable-data-reduction-proxy-force-pingback";
 
+// If set, enables use of QUIC with non core data reduction proxies.
+const char kDataReductionProxyEnableQuicOnNonCoreProxies[] =
+    "data-reduction-proxy-enable-quic-on-non-core-proxies";
+
 }  // namespace switches
 }  // namespace data_reduction_proxy