Bypass data reduction proxy when using VPN

components/data_reduction_proxy/browser/data_reduction_proxy_settings_unittest.cc

Index: components/data_reduction_proxy/browser/data_reduction_proxy_settings_unittest.cc
diff --git a/components/data_reduction_proxy/browser/data_reduction_proxy_settings_unittest.cc b/components/data_reduction_proxy/browser/data_reduction_proxy_settings_unittest.cc
index 28548827409f0d54e7503500d8d601accf29ebea..b3507824a1ca41b62a3eb9bf01a3a9f2f6d75e7e 100644
--- a/components/data_reduction_proxy/browser/data_reduction_proxy_settings_unittest.cc
+++ b/components/data_reduction_proxy/browser/data_reduction_proxy_settings_unittest.cc
@@ -296,8 +296,37 @@ TEST_F(DataReductionProxySettingsTest, TestOnIPAddressChanged) {
                        true,
                        true,
                        false);
-  // IP address change triggers a probe that succeed. Proxy is unrestricted.
-  CheckProbeOnIPChange(kProbeURLWithBadResponse,
+  // IP address change triggers a probe that succeeds. Proxy is unrestricted.
+  CheckProbeOnIPChange(kProbeURLWithOKResponse,
+                       kWarmupURLWithNoContentResponse,
+                       "OK",
+                       true,
+                       false,
+                       false);
+  // Simulate a VPN connection. The proxy should be disabled.
+  MockSettings* settings = static_cast<MockSettings*>(settings_.get());
+  settings->network_interfaces_.reset(new net::NetworkInterfaceList());
+  settings->network_interfaces_->push_back(
+      net::NetworkInterface("tun0",
+                            "tun0",
+                            0,
+                            net::NetworkChangeNotifier::CONNECTION_WIFI,
+                            net::IPAddressNumber(),
+                            0));
+  settings_->OnIPAddressChanged();
+  base::MessageLoop::current()->RunUntilIdle();
+  CheckProxyConfigs(false, false, false);
+
+  // Check that the proxy is re-enabled if a non-VPN connection is later used.
+  settings->network_interfaces_.reset(new net::NetworkInterfaceList());
+  settings->network_interfaces_->push_back(
+      net::NetworkInterface("eth0",
+                            "eth0",
+                            0,
+                            net::NetworkChangeNotifier::CONNECTION_WIFI,
+                            net::IPAddressNumber(),
+                            0));
+  CheckProbeOnIPChange(kProbeURLWithOKResponse,
                        kWarmupURLWithNoContentResponse,
                        "OK",
                        true,