Add CORS headers to URLRequestRedirectJob.

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

Index: chrome/test/data/extensions/api_test/webrequest/framework.js
diff --git a/chrome/test/data/extensions/api_test/webrequest/framework.js b/chrome/test/data/extensions/api_test/webrequest/framework.js
index 23b1303bd038b5bf3517662b914dad1cd9ec8695..51164a35834455e4d995fc704367b32edf8085b8 100644
--- a/chrome/test/data/extensions/api_test/webrequest/framework.js
+++ b/chrome/test/data/extensions/api_test/webrequest/framework.js
@@ -203,6 +203,15 @@ function captureEvent(name, details, callback) {
     }
     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