Make it possible to build url/ without ICU on android.

url/android/java/src/org/chromium/url/IDNStringUtil.java

Index: url/android/java/src/org/chromium/url/IDNStringUtil.java
diff --git a/url/android/java/src/org/chromium/url/IDNStringUtil.java b/url/android/java/src/org/chromium/url/IDNStringUtil.java
new file mode 100644
index 0000000000000000000000000000000000000000..32000fde5946fca3ec263943bb063ddf030b5917
--- /dev/null
+++ b/url/android/java/src/org/chromium/url/IDNStringUtil.java
@@ -0,0 +1,33 @@
+// Copyright 2014 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.url;
+
+import org.chromium.base.CalledByNative;
+import org.chromium.base.JNINamespace;
+
+import java.net.IDN;
+
+/**
+ * This class is used to convert unicode IDN domain names to ASCII, when not
+ * building with ICU.
+ */
+@JNINamespace("url::android")
+public class IDNStringUtil {
+    /**
+     * Attempts to convert a Unicode string to an ASCII string using IDN rules.
+     * As of May 2014, the underlying Java function IDNA2003.
+     * @param src String to convert.
+     * @return: String containing only ASCII characters on success, null on
+     *                 failure.
+     */
+    @CalledByNative
+    private static String idnToASCII(String src) {
+        try {
+            return IDN.toASCII(src, IDN.USE_STD3_ASCII_RULES);
+        } catch (Exception e) {
+            return null;
+        }
+    }
+}