Include the Origin header for XHR and Fetch API even if the request is same-origin

third_party/WebKit/LayoutTests/http/tests/cache/xhr-vary-header.html

 <p>Test that XMLHttpRequest doesn't return a wrong cached answer when there is a Vary header in response.</p>
 
 <script src="/js-test-resources/js-test.js"></script>
 <script>
 window.jsTestIsAsync = true;
 
 if (location.protocol != "http:" || location.host != "127.0.0.1:8000")
     debug("This test must be run from http://127.0.0.1:8000");
 
 var testStep = 1;
 
 function testCrossOrigin()
 {
     var req = new XMLHttpRequest;
-    req.open("get", "http://localhost:8000/cache/resources/xhr-vary-header-response.php");
+    req.open("GET", "http://localhost:8080/cache/resources/xhr-vary-header-response.php");
     req.onload=function() { receivedResponse(req.responseText) }
     req.send();
 }
 
 function testSameOrigin()
 {
     frames[0].postMessage("", "http://localhost:8000");
 }
 
 function receivedResponse(text)
 {
     window.responseText = text;
     switch (testStep) {
         case 1:
-            shouldBe("responseText", "'Cross origin response'");
+            shouldBe("responseText", "'Origin header value is http://127.0.0.1:8000'");
             testStep++;
             testSameOrigin();
             break;
         case 2:
-            shouldBe("responseText", "'Same origin response'");
+            shouldBe("responseText", "'Origin header value is http://localhost:8000'");
             testStep++;
             testCrossOrigin();
             break;
         case 3:
-            shouldBe("responseText", "'Cross origin response'");
+            shouldBe("responseText", "'Origin header value is http://127.0.0.1:8000'");
             finishJSTest();
             testStep++;
             break;
         default:
             debug(responseText);
             break;
     }
     delete window.responseText;
 }
 
 window.onmessage = function(msg) { receivedResponse(msg.data) }
 window.onload = testCrossOrigin;
 
 </script>
 
 <button onclick="testCrossOrigin()">Make cross origin request</button>
 <br>
 <iframe src="http://localhost:8000/cache/resources/xhr-vary-header-subframe.html" frameborder=0 height=50></iframe>
 <pre id=console></pre>