Some cleanup of app and extension CSP tests.

chrome/test/data/extensions/api_test/sandboxed_pages_csp/main.js

 // Copyright 2016 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.
 
 var LOCAL_FILE_NAME = 'local_frame.html';
 var REMOTE_FILE_NAME = 'remote_frame.html';
 
 onmessage = function(e) {
-  chrome.test.assertEq(e.data, 'succeeded');
+  chrome.test.assertEq('succeeded', e.data);
   chrome.test.succeed();
 };
 
 var loadIframeContentInSandboxedPage = function(localUrl, remoteUrl) {
   var sandboxedFrame = document.createElement('iframe');
   sandboxedFrame.src = 'sandboxed.html';
   sandboxedFrame.onload = function() {
     sandboxedFrame.contentWindow.postMessage(
         JSON.stringify(['load', localUrl, remoteUrl]), '*');
     sandboxedFrame.onload = null;
   };
   document.body.appendChild(sandboxedFrame);
 };
 
 onload = function() {
   chrome.test.getConfig(function(config) {
     chrome.test.runTests([
       // Local frame will succeed loading, but remote frame will fail.
       function sandboxedFrameTestLocalAndRemote() {
         var remoteUrl = 'http://localhost:' + config.testServer.port +
             '/extensions/api_test/sandboxed_pages_csp/' + REMOTE_FILE_NAME;
         loadIframeContentInSandboxedPage(
             LOCAL_FILE_NAME, remoteUrl);
       }
     ]);
   });
 };