Create abstraction for DataReductionProxyParams.

components/data_reduction_proxy/core/browser/data_reduction_proxy_usage_stats_unittest.cc

Index: components/data_reduction_proxy/core/browser/data_reduction_proxy_usage_stats_unittest.cc
diff --git a/components/data_reduction_proxy/core/browser/data_reduction_proxy_usage_stats_unittest.cc b/components/data_reduction_proxy/core/browser/data_reduction_proxy_usage_stats_unittest.cc
index 51afeba981c27de1945f12d7e7cadaa5c971d268..e2b588c8006b9a672cbf138d7a5eaac4803e9693 100644
--- a/components/data_reduction_proxy/core/browser/data_reduction_proxy_usage_stats_unittest.cc
+++ b/components/data_reduction_proxy/core/browser/data_reduction_proxy_usage_stats_unittest.cc
@@ -641,7 +641,7 @@ class DataReductionProxyUsageStatsEndToEndTest : public testing::Test {
     return drp_test_context_->settings();
   }
 
-  DataReductionProxyConfig* config() const {
+  TestDataReductionProxyConfig* config() const {
     return drp_test_context_->config();
   }
 
@@ -905,7 +905,7 @@ TEST_F(DataReductionProxyUsageStatsEndToEndTest, BypassedBytesNetErrorOther) {
   // Make the data reduction proxy host fail to resolve.
   scoped_ptr<net::MockHostResolver> host_resolver(new net::MockHostResolver());
   host_resolver->rules()->AddSimulatedFailure(
-      config()->Origin().host_port_pair().host());
+      config()->test_params()->origin().host_port_pair().host());
   set_host_resolver(host_resolver.get());
   InitializeContext();