[Extensions] Implement a simple Management API test.

This CL implements a simple test for chrome.management.get.

Bug: 1093066
Change-Id: I536b6eee36bd623d9bc772d1b5a357be69542181
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2441930
Commit-Queue: David Bertoni <dbertoni@chromium.org>
Reviewed-by: Kelvin Jiang <kelvinjiang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#815234}

chrome/browser/extensions/api/management/management_api_browsertest.cc

@@ -203,6 +203,15 @@ IN_PROC_BROWSER_TEST_F(ExtensionManagementApiBrowserTest,
   ASSERT_TRUE(listener1.WaitUntilSatisfied());
 }
 
+IN_PROC_BROWSER_TEST_P(ExtensionManagementApiTestWithBackgroundType, Get) {
+  ExtensionTestMessageListener listener("success", false);
+  ASSERT_TRUE(
+      LoadExtension(test_data_dir_.AppendASCII("management/simple_extension")));
+  ASSERT_TRUE(LoadExtensionWithParamFlags(
+      test_data_dir_.AppendASCII("management/get")));
+  ASSERT_TRUE(listener.WaitUntilSatisfied());
+}
+
 IN_PROC_BROWSER_TEST_P(ExtensionManagementApiTestWithBackgroundType,
                        GetSelfNoPermissions) {
   ExtensionTestMessageListener listener1("success", false);

chrome/test/data/extensions/management/get/background.js

+// Copyright 2020 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.
+
+chrome.management.get('pkplfbidichfdicaijlchgnapepdginl', function(info) {
+  chrome.test.assertTrue(info != null);
+  chrome.test.assertEq('pkplfbidichfdicaijlchgnapepdginl', info.id);
+  chrome.test.assertEq("simple_extension", info.name);
+  chrome.test.assertEq("extension", info.type);
+  chrome.test.assertTrue(info.enabled);
+  chrome.test.sendMessage("success");
+});

chrome/test/data/extensions/management/get/manifest.json

+{
+  "name": "Get Test",
+  "version": "1",
+  "manifest_version": 2,
+  "permissions": ["management"],
+  "background": {
+    "scripts": ["background.js"],
+    "persistent": true
+  }
+}

chrome/test/data/extensions/management/simple_extension/manifest.json

 {
   "name": "simple_extension",
+  // chrome-extension://pkplfbidichfdicaijlchgnapepdginl
+  "key": "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAtDfX9dHNh948bt00YhZBm3P6E5QLaOt+v8kXVtibQfiPtOD2FTScB/f0wX/EQWVO7BkaSOsRkTPcPIgocyMPYr2FLgqGLFlYT9nQpKJZUFNF5oJ5rG6Nv7ppf4zEB3j6da1IBRTz2yOZ+6O1TMZxol/V62/QcqrJeggsHTEPGLdr9Ua4b1Ka0xKJnJngZljsbw93FI1o+P9dAh5BS6wTPiZI/vmJVjvMTkSTnaZ3n9Go2t7A0XLcSxLcVyuLAd2mAvSN0mIviOukdM66wr7llif71nKuUt+4qvlr/r9HfwzN6pA4jkwhtS1UD+3CmB+wsHwsnohNcuu4FIQ6rgq/7QIDAQAB",
   "manifest_version": 2,
   "version": "1"
 }