[Android] Upstream org.chromium.base.test.UrlUtils (partially) and device files

base/android/javatests/src/org/chromium/base/test/UrlUtils.java

+// Copyright (c) 2012 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.base.test;
+
+/**
+ * Collection of URL utilities.
+ */
+public class UrlUtils {
+    // See TEST_DATA_DIR in build/android/pylib/constants.py
+    private final static String DATA_DIR = "file:///sdcard/chrome/test/data/";
+
+    /**
+     * Construct a suitable URL for loading a test data file.
+     *
+     * @param path Pathname relative to chrome/test/data/android/device_files
+     */
+    public static String getTestFileUrl(String path) {
+        return DATA_DIR + path;
+    }
+}