Implement net/ support for Android's NetworkSecurityPolicy

net/android/java/src/org/chromium/net/AndroidNetworkLibrary.java

Index: net/android/java/src/org/chromium/net/AndroidNetworkLibrary.java
diff --git a/net/android/java/src/org/chromium/net/AndroidNetworkLibrary.java b/net/android/java/src/org/chromium/net/AndroidNetworkLibrary.java
index 1656e2c38565ed038441a860e007ae0f9eb28304..d33321c0202ce72c96f49d9f1c3c693520aaa372 100644
--- a/net/android/java/src/org/chromium/net/AndroidNetworkLibrary.java
+++ b/net/android/java/src/org/chromium/net/AndroidNetworkLibrary.java
@@ -17,6 +17,7 @@ import android.net.wifi.WifiInfo;
 import android.net.wifi.WifiManager;
 import android.os.Build;
 import android.security.KeyChain;
+import android.security.NetworkSecurityPolicy;
 import android.telephony.TelephonyManager;
 import android.util.Log;
 
@@ -243,4 +244,21 @@ class AndroidNetworkLibrary {
         }
         return "";
     }
+
+    /**
+     * Returns true if cleartext traffic to |host| is allowed by the current app. Always true on L
+     * and older.
+     */
+    @TargetApi(Build.VERSION_CODES.N)
+    @CalledByNative
+    private static boolean isCleartextPermitted(String host) {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
+            NetworkSecurityPolicy policy = NetworkSecurityPolicy.getInstance();
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
+                return policy.isCleartextTrafficPermitted(host);
+            }
+            return policy.isCleartextTrafficPermitted();
+        }
+        return true;
+    }
 }