Split ExtensionWebRequestApiTest.PostData into two

chrome/test/data/extensions/api_test/webrequest/test_post.js

 // 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.
 
+// Common definitions for test_post?.js.
+
 var dirName = "requestBody/";
 
 function sendPost(formFile, parseableForm) {
   // The following variables must be updated when files in |dirName| change.
   var formData = {
       "check": ["option_A"],
       "password": ["password"],
       "radio": ["Yes"],
       "select": ["one"],
       "text\"1\u011B\u0161\u00FD\u4EBA\r\n \r\n": ["TEST_TEXT_1"],
@@ skipping 106 matching lines @@
       [  // event order
         ["a-onBeforeRequest", "a-onResponseStarted", "a-onCompleted",
          "s-onBeforeRequest", "s-onResponseStarted", "s-onCompleted",
          "b-onBeforeRequest", "b-onResponseStarted", "b-onCompleted"]
       ],
       {urls: ["<all_urls>"]},  // filter
       ["requestBody"]);
     navigateAndWait(getURL(dirName + formFile));
   }
 }
-
-runTests([
-  // Navigates to a page with a form and submits it, generating a POST request.
-  // First two result in url-encoded form.
-  sendPost('no-enctype.html', true),
-  sendPost('urlencoded.html', true),
-  // Third results in multipart-encoded form.
-  sendPost('multipart.html', true),
-  // Fourth results in unparseable form, and thus raw data string.
-  sendPost('plaintext.html', false),
-]);