Dev finch trial of the data reduction proxy overrides both the primary and the fallback hosts

components/data_reduction_proxy/browser/data_reduction_proxy_params.cc

Index: components/data_reduction_proxy/browser/data_reduction_proxy_params.cc
diff --git a/components/data_reduction_proxy/browser/data_reduction_proxy_params.cc b/components/data_reduction_proxy/browser/data_reduction_proxy_params.cc
index 3088e083eabe41bbfde98532a6d12f9ec78fc1fd..43d0795a573ce019e49491ef52d8bcc3a916862d 100644
--- a/components/data_reduction_proxy/browser/data_reduction_proxy_params.cc
+++ b/components/data_reduction_proxy/browser/data_reduction_proxy_params.cc
@@ -253,6 +253,8 @@ void DataReductionProxyParams::InitWithoutChecks() {
   if (origin.empty())
     origin = GetDefaultOrigin();
   if (fallback_origin.empty())
+    fallback_origin = GetDefaultDevFallbackOrigin();
+  if (fallback_origin.empty())
     fallback_origin = GetDefaultFallbackOrigin();
   if (ssl_origin.empty())
     ssl_origin = GetDefaultSSLOrigin();
@@ -396,6 +398,20 @@ std::string DataReductionProxyParams::GetDefaultDevOrigin() const {
   return std::string();
 }
 
+std::string DataReductionProxyParams::GetDefaultDevFallbackOrigin() const {
+#if defined(DATA_REDUCTION_DEV_FALLBACK_HOST)
+  const CommandLine& command_line = *CommandLine::ForCurrentProcess();
+  if (command_line.HasSwitch(switches::kDisableDataReductionProxyDev))
+    return std::string();
+  if (command_line.HasSwitch(switches::kEnableDataReductionProxyDev) ||
+      (FieldTrialList::FindFullName("DataCompressionProxyDevRollout") ==
+           kEnabled)) {
+    return DATA_REDUCTION_DEV_FALLBACK_HOST;
+  }
+#endif
+  return std::string();
+}
+
 bool DataReductionProxyParams::AreDataReductionProxiesBypassed(
     const net::URLRequest& request, base::TimeDelta* min_retry_delay) const {
   if (request.context() != NULL &&