Implement net/ support for Android's NetworkSecurityPolicy

net/android/javatests/src/org/chromium/net/AndroidNetworkLibraryTestUtil.java

Index: net/android/javatests/src/org/chromium/net/AndroidNetworkLibraryTestUtil.java
diff --git a/net/android/javatests/src/org/chromium/net/AndroidNetworkLibraryTestUtil.java b/net/android/javatests/src/org/chromium/net/AndroidNetworkLibraryTestUtil.java
new file mode 100644
index 0000000000000000000000000000000000000000..651d1286d19ab1f7eacec2b26506026eaf82a387
--- /dev/null
+++ b/net/android/javatests/src/org/chromium/net/AndroidNetworkLibraryTestUtil.java
@@ -0,0 +1,32 @@
+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.net;
+
+import android.annotation.TargetApi;
+import android.os.Build;
+import android.security.NetworkSecurityPolicy;
+
+import org.chromium.base.annotations.CalledByNative;
+
+import java.lang.reflect.Method;
+
+/**
+ * Utility functions for testing features implemented in AndroidNetworkLibrary.
+ */
+public class AndroidNetworkLibraryTestUtil {
+    /**
+     * Helper for tests that simulates an app disallowing cleartext traffic entirely.

[pauljensen, 2016/12/14 18:08:05]

nit: might want to mention only works for M+

[mgersh, 2016/12/14 19:17:24]

Done.

+     */
+    @TargetApi(Build.VERSION_CODES.M)
+    @CalledByNative
+    private static void setUpSecurityPolicyForTesting(boolean cleartextPermitted) throws Exception {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
+            Method setCleartextTrafficPermitted = NetworkSecurityPolicy.class.getDeclaredMethod(
+                    "setCleartextTrafficPermitted", boolean.class);
+            setCleartextTrafficPermitted.invoke(
+                    NetworkSecurityPolicy.getInstance(), cleartextPermitted);
+        }
+    }
+}