Delay generation of User-Agent header to URLRequestHttpJob and accept custom User-Agent from XHR/Fe…

third_party/WebKit/LayoutTests/http/tests/xmlhttprequest/set-dangerous-headers.html

Index: third_party/WebKit/LayoutTests/http/tests/xmlhttprequest/set-dangerous-headers.html
diff --git a/third_party/WebKit/LayoutTests/http/tests/xmlhttprequest/set-dangerous-headers.html b/third_party/WebKit/LayoutTests/http/tests/xmlhttprequest/set-dangerous-headers.html
index 6427b15c77369f0a348d0aa12f4caa1f678a9302..ee28c00f425ae31ecf750306bffcc3b87fcf2283 100644
--- a/third_party/WebKit/LayoutTests/http/tests/xmlhttprequest/set-dangerous-headers.html
+++ b/third_party/WebKit/LayoutTests/http/tests/xmlhttprequest/set-dangerous-headers.html
@@ -5,7 +5,7 @@
 <script>
     if (window.testRunner)
         testRunner.dumpAsText();
-    
+
     req = new XMLHttpRequest;
     req.open("GET", "resources/print-headers.cgi", false);
 
@@ -13,11 +13,6 @@
     req.setRequestHeader("ACCEPT-ENCODING", "foobar");
     req.setRequestHeader("ACCESS-CONTROL-REQUEST-HEADERS", "foobar");
     req.setRequestHeader("ACCESS-CONTROL-REQUEST-METHOD", "foobar");
-    // AUTHORIZATION is no longer forbidden. See
-    // https://bugs.webkit.org/show_bug.cgi?id=24957 for more details. Set to
-    // a value other than the foobar since some http servers (lighttp) do not
-    // strip this out (Apache does).
-    req.setRequestHeader("AUTHORIZATION", "baz");
     req.setRequestHeader("CONNECTION", "foobar");
     req.setRequestHeader("CONTENT-LENGTH", "123456");
     req.setRequestHeader("COOKIE", "foobar");
@@ -33,7 +28,6 @@
     req.setRequestHeader("TRAILER", "foobar");
     req.setRequestHeader("TRANSFER-ENCODING", "foobar");
     req.setRequestHeader("UPGRADE", "foobar");
-    req.setRequestHeader("USER-AGENT", "foobar");
     req.setRequestHeader("VIA", "foobar");
 
     req.setRequestHeader("Proxy-", "foobar");
@@ -45,7 +39,7 @@
     req.setRequestHeader("SEC-FOO", "foobar");
 
     try {
-        req.send("");
+        req.send();
         if (req.responseText.match("100-continue|foobar|123456"))
             document.getElementById("result").textContent = req.responseText;
         else