Improve handling of CORS redirects for some resource loads.

LayoutTests/http/tests/htmlimports/redirect-cross-origin-expected.txt

Index: LayoutTests/http/tests/htmlimports/redirect-cross-origin-expected.txt
diff --git a/LayoutTests/http/tests/htmlimports/redirect-cross-origin-expected.txt b/LayoutTests/http/tests/htmlimports/redirect-cross-origin-expected.txt
new file mode 100644
index 0000000000000000000000000000000000000000..1fc4a707f58e60e3379e1516ed02d62f4ad58a08
--- /dev/null
+++ b/LayoutTests/http/tests/htmlimports/redirect-cross-origin-expected.txt
@@ -0,0 +1,12 @@
+CONSOLE ERROR: Redirect at origin 'http://localhost:8000' has been blocked from loading by Cross-Origin Resource Sharing policy: 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: Redirect at origin 'http://localhost:8000' has been blocked from loading by Cross-Origin Resource Sharing policy: 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: Redirect at origin 'http://localhost:8000' has been blocked from loading by Cross-Origin Resource Sharing policy: 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: Redirect at origin 'http://localhost:8000' has been blocked from loading by Cross-Origin Resource Sharing policy: 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: Redirect at origin 'http://localhost:8000' has been blocked from loading by Cross-Origin Resource Sharing policy: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://127.0.0.1:8000' is therefore not allowed access.
+
+PASS Blocking access to a same origin import including cross domain redirect 
+PASS Blocking access to a CORS origin import including cross domain redirect 
+PASS Blocking access to a same origin import including intermediate cross domain redirect 
+PASS Blocking access to a CORS origin import including intermediate cross domain redirect 
+PASS Blocking access to a CORS requested but eventually same origin import including intermediate cross domain redirect 
+