Move another block of extension tests to manifest_version 2

chrome/test/data/extensions/api_test/proxy/events/parse_error.html

-<script>
-// Copyright (c) 2011 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.
-
-// proxy api test
-// browser_tests.exe --gtest_filter=ProxySettingsApiTest.ProxyEventsParseError
-
-var expected_error = {
-    error: "net::ERR_PAC_SCRIPT_FAILED",
-    details: "line: 1: Uncaught SyntaxError: Unexpected token !",
-    fatal: false
-};
-
-function test() {
-  // Install error handler and get the test server config.
-  chrome.proxy.onProxyError.addListener(function (error) {
-    chrome.test.assertEq(expected_error, error);
-    chrome.test.notifyPass();
-  });
-
-  // Set an invalid PAC script. This should trigger a proxy errors.
-  var config = {
-    mode: "pac_script",
-    pacScript: {
-      data: "trash!",
-      mandatory: false
-    }
-  };
-  chrome.proxy.settings.set({'value': config}, testDone);
-}
-
-function testDone() {
- // Do nothing. The test success/failure is decided in the event handler.
-}
-
-test();
-</script>
+<!--
+ * Copyright (c) 2011 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.
+-->
+<script src="parse_error.js"></script>