[Merge to M-58] Add a warning for the deprecation of content-initiated data URL navigations

third_party/WebKit/LayoutTests/http/tests/xmlhttprequest/send-on-abort.html

 <!-- https://bugs.webkit.org/show_bug.cgi?id=22672
      ASSERT(m_table) when xhr.onabort creates another xhr or calls setTimeout
 -->
 <script>
 if (window.testRunner) {
     testRunner.dumpAsText();
     testRunner.waitUntilDone();
 }
 
 function abortHandler()
 {
     xhr2 = new XMLHttpRequest;
     setTimeout("alert('FAAAIL!')", 100);
 }
 
 function onreadystatechangeHandler()
 {
     if (xhr.readyState == 4)
         abortHandler();
 }
 
 xhr = new XMLHttpRequest;
 xhr.onabort = abortHandler;
 xhr.onreadystatechange = onreadystatechangeHandler;
-xhr.open("GET", "foo.txt", true); 
+xhr.open("GET", "foo.txt", true);
 xhr.send(null);
-location.href = "data:text/html,PASS: No assertion failure.<script>if (window.testRunner) testRunner.notifyDone()</scr" + "ipt>";
+location.href = "../misc/resources/notify-success.html";
 </script>