Do not disable Data Reduction Proxy on VPN.

components/data_reduction_proxy/core/browser/data_reduction_proxy_config_unittest.cc

Index: components/data_reduction_proxy/core/browser/data_reduction_proxy_config_unittest.cc
diff --git a/components/data_reduction_proxy/core/browser/data_reduction_proxy_config_unittest.cc b/components/data_reduction_proxy/core/browser/data_reduction_proxy_config_unittest.cc
index f6f522c1b7c1e2cc2e21014fc691cc11507761c6..103f0a317af1f8ec115c595def4004365df9d504 100644
--- a/components/data_reduction_proxy/core/browser/data_reduction_proxy_config_unittest.cc
+++ b/components/data_reduction_proxy/core/browser/data_reduction_proxy_config_unittest.cc
@@ -143,6 +143,26 @@ class DataReductionProxyConfigTest : public testing::Test {
   scoped_ptr<TestDataReductionProxyParams> expected_params_;
 };
 
+TEST_F(DataReductionProxyConfigTest, TestMaybeDisableIfVPNTrialDisabled) {
+  // Simulate a VPN connection.
+  config()->interfaces()->clear();
+  config()->interfaces()->push_back(net::NetworkInterface(
+      "tun0", /* network interface name */
+      "tun0", /* network interface friendly name */
+      0,      /* interface index */
+      net::NetworkChangeNotifier::CONNECTION_WIFI, net::IPAddressNumber(),
+      0,                             /* network prefix */
+      net::IP_ADDRESS_ATTRIBUTE_NONE /* ip address attribute */
+      ));
+  EXPECT_TRUE(config()->MaybeDisableIfVPN());
+}
+
+TEST_F(DataReductionProxyConfigTest, TestMaybeDisableIfVPNTrialEnabled) {
+  base::CommandLine::ForCurrentProcess()->AppendSwitchASCII(
+      "force-fieldtrials", "DataReductionProxyUseDataSaverOnVPN/Enabled");
+  EXPECT_FALSE(config()->MaybeDisableIfVPN());
+}
+
 TEST_F(DataReductionProxyConfigTest, TestUpdateConfigurator) {
   base::CommandLine::ForCurrentProcess()->AppendSwitchASCII(
       switches::kDataReductionProxyAlt, params()->DefaultAltOrigin());