Remove BooleanPrefMember usage from Data Reduction Proxy IO classes.

components/data_reduction_proxy/core/browser/data_reduction_proxy_io_data_unittest.cc

Index: components/data_reduction_proxy/core/browser/data_reduction_proxy_io_data_unittest.cc
diff --git a/components/data_reduction_proxy/core/browser/data_reduction_proxy_io_data_unittest.cc b/components/data_reduction_proxy/core/browser/data_reduction_proxy_io_data_unittest.cc
index 4caf2158601f6d64b02c9d96e32a02d0fb20fee5..24fc634a62cd416aa07ee610321836c958012a08 100644
--- a/components/data_reduction_proxy/core/browser/data_reduction_proxy_io_data_unittest.cc
+++ b/components/data_reduction_proxy/core/browser/data_reduction_proxy_io_data_unittest.cc
@@ -94,8 +94,8 @@ class DataReductionProxyIODataTest : public testing::Test {
 TEST_F(DataReductionProxyIODataTest, TestConstruction) {
   scoped_ptr<DataReductionProxyIOData> io_data(new DataReductionProxyIOData(
       Client::UNKNOWN, DataReductionProxyParams::kAllowed, net_log(),
-      message_loop_proxy(), message_loop_proxy(), false /* enable_quic */,
-      std::string() /* user_agent */));
+      message_loop_proxy(), message_loop_proxy(), false /* enabled */,
+      false /* enable_quic */, std::string() /* user_agent */));
 
   // Check that the SimpleURLRequestContextGetter uses vanilla HTTP.
   net::URLRequestContext* request_context =
@@ -141,9 +141,6 @@ TEST_F(DataReductionProxyIODataTest, TestConstruction) {
                                  true);
   EXPECT_NE(nullptr, io_data->bypass_stats());
 
-  // The Data Reduction Proxy isn't actually enabled here.
-  io_data->InitOnUIThread(prefs());
-  EXPECT_FALSE(io_data->IsEnabled());
   io_data->ShutdownOnUIThread();
 }