Preserve custom headers when following cross-origin redirects.

third_party/WebKit/LayoutTests/http/tests/xmlhttprequest/redirect-cross-origin-tripmine-expected.txt

Index: third_party/WebKit/LayoutTests/http/tests/xmlhttprequest/redirect-cross-origin-tripmine-expected.txt
diff --git a/third_party/WebKit/LayoutTests/http/tests/xmlhttprequest/redirect-cross-origin-tripmine-expected.txt b/third_party/WebKit/LayoutTests/http/tests/xmlhttprequest/redirect-cross-origin-tripmine-expected.txt
index ea5cbabf758ab1a2bf1f8026c5b945c31988e88e..5b397bcf9c71f058f67efbeedb9a7cfb30440330 100644
--- a/third_party/WebKit/LayoutTests/http/tests/xmlhttprequest/redirect-cross-origin-tripmine-expected.txt
+++ b/third_party/WebKit/LayoutTests/http/tests/xmlhttprequest/redirect-cross-origin-tripmine-expected.txt
@@ -1,13 +1,13 @@
 CONSOLE WARNING: line 21: Synchronous XMLHttpRequest on the main thread is deprecated because of its detrimental effects to the end user's experience. For more help, check https://xhr.spec.whatwg.org/.
-CONSOLE ERROR: XMLHttpRequest cannot load http://localhost:8000/resources/tripmine.php. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://127.0.0.1:8000' is therefore not allowed access.
-CONSOLE ERROR: XMLHttpRequest cannot load http://localhost:8000/resources/tripmine.php. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://127.0.0.1:8000' is therefore not allowed access.
-CONSOLE ERROR: XMLHttpRequest cannot load http://localhost:8000/resources/tripmine.php. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://127.0.0.1:8000' is therefore not allowed access.
-CONSOLE ERROR: XMLHttpRequest cannot load http://localhost:8000/resources/tripmine.php. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://127.0.0.1:8000' is therefore not allowed access.
-CONSOLE ERROR: XMLHttpRequest cannot load http://localhost:8000/resources/tripmine.php. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://127.0.0.1:8000' is therefore not allowed access.
-CONSOLE ERROR: XMLHttpRequest cannot load http://localhost:8000/resources/tripmine.php. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://127.0.0.1:8000' is therefore not allowed access.
 CONSOLE ERROR: XMLHttpRequest cannot load http://localhost:8000/resources/tripmine.php. Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://127.0.0.1:8000' is therefore not allowed access.
-CONSOLE ERROR: XMLHttpRequest cannot load http://localhost:8000/resources/tripmine.php. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://127.0.0.1:8000' is therefore not allowed access.
-CONSOLE ERROR: XMLHttpRequest cannot load http://localhost:8000/resources/tripmine.php. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://127.0.0.1:8000' is therefore not allowed access.
+CONSOLE ERROR: XMLHttpRequest cannot load http://localhost:8000/resources/tripmine.php. Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://127.0.0.1:8000' is therefore not allowed access.
+CONSOLE ERROR: XMLHttpRequest cannot load http://localhost:8000/resources/tripmine.php. Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://127.0.0.1:8000' is therefore not allowed access.
+CONSOLE ERROR: XMLHttpRequest cannot load http://localhost:8000/resources/tripmine.php. Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://127.0.0.1:8000' is therefore not allowed access.
+CONSOLE ERROR: XMLHttpRequest cannot load http://localhost:8000/resources/tripmine.php. Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://127.0.0.1:8000' is therefore not allowed access.
+CONSOLE ERROR: XMLHttpRequest cannot load http://localhost:8000/resources/tripmine.php. Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://127.0.0.1:8000' is therefore not allowed access.
+CONSOLE ERROR: XMLHttpRequest cannot load http://localhost:8000/resources/tripmine.php. Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://127.0.0.1:8000' is therefore not allowed access.
+CONSOLE ERROR: XMLHttpRequest cannot load http://localhost:8000/resources/tripmine.php. Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://127.0.0.1:8000' is therefore not allowed access.
+CONSOLE ERROR: XMLHttpRequest cannot load http://localhost:8000/resources/tripmine.php. Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://127.0.0.1:8000' is therefore not allowed access.
 CONSOLE ERROR: XMLHttpRequest cannot load http://localhost:8000/resources/tripmine.php. Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://127.0.0.1:8000' is therefore not allowed access.
 Test that a cross-origin redirect does not result in a non-simple request being sent to the target.