Add CORS headers to URLRequestRedirectJob.

chrome/test/data/extensions/api_test/webrequest/framework.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.
 
 var getURL = chrome.extension.getURL;
 var deepEq = chrome.test.checkDeepEq;
 var expectedEventData;
 var capturedEventData;
 var capturedUnexpectedData;
 var expectedEventOrder;
@@ skipping 185 matching lines @@
     chrome.test.assertTrue('frameId' in details &&
                            typeof details.frameId === 'number');
     chrome.test.assertTrue('tabId' in details &&
                             typeof details.tabId === 'number');
     var key = details.tabId + "-" + details.frameId;
     if (details.type == "main_frame" || details.type == "sub_frame") {
       tabAndFrameUrls[key] = details.url;
     }
     details.frameUrl = tabAndFrameUrls[key] || "unknown frame URL";
   }
+  if (name == "onBeforeRedirect") {
+    // This value is just an implementation detail of the network layer.
+    // This status code means that the redirect originates from the network
+    // layer, e.g. caused by a Chrome extension.
+    // The status line is not guaranteed to be stable.
+    if (details.statusLine == "HTTP/1.1 307 Delegate") {
+      details.statusLine = "";
+    }
+  }
 
   // This assigns unique IDs to frames. The new IDs are only deterministic, if
   // the frames documents are loaded in order. Don't write browser tests with
   // more than one frame ID and rely on their numbers.
   if (!(details.frameId in frameIdMap)) {
     // Subtract one to discount for {"-1": -1} mapping that always exists.
     // This gives the first frame the ID 0.
     frameIdMap[details.frameId] = Object.keys(frameIdMap).length - 1;
   }
   details.frameId = frameIdMap[details.frameId];
@@ skipping 163 matching lines @@
   helper('onHeadersReceived');
   helper('onResponseStarted');
   helper('onBeforeRedirect');
   helper('onCompleted');
   helper('onErrorOccurred');
 }
 
 function resetDeclarativeRules() {
   chrome.declarativeWebRequest.onRequest.removeRules();
 }