Adds ContentShellTest.apk and very simple test.

content/shell/android/javatests/src/org/chromium/content_shell/ContentShellUrlTest.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.content_shell;
+
+import android.app.Activity;
+import android.test.ActivityInstrumentationTestCase2;
+import android.test.suitebuilder.annotation.SmallTest;
+
+/**
+ * Example test that just starts the content shell.
+ */
+public class ContentShellUrlTest extends ContentShellTestBase {
+    // URL used for base tests.
+    private static final String URL = "data:text";
+
+    @SmallTest
+    public void testBaseStartup() throws Exception {
+        ContentShellActivity activity = launchContentShellWithUrl(URL);
+
+        // Make sure the activity was created as expected.
+        assertNotNull(activity);
+
+        // Make sure that the URL is set as expected.
+        assertEquals(URL, activity.getActiveShellView().getContentView().getUrl());
+    }
+}