CORS: Update the redirection status in Inspector Network tab for CORS requests.

Source/core/loader/DocumentThreadableLoader.cpp

Index: Source/core/loader/DocumentThreadableLoader.cpp
diff --git a/Source/core/loader/DocumentThreadableLoader.cpp b/Source/core/loader/DocumentThreadableLoader.cpp
index 247f43c8bb743553d9e07826b945988685f3c213..42d67d7eca17cbc6e0847045e50490d669a0b9a6 100644
--- a/Source/core/loader/DocumentThreadableLoader.cpp
+++ b/Source/core/loader/DocumentThreadableLoader.cpp
@@ -206,13 +206,18 @@ void DocumentThreadableLoader::redirectReceived(Resource* resource, ResourceRequ
     // scheme and not contain the userinfo production. In addition, the redirect response must pass the access control check if the
     // original request was not same-origin.
     if (m_options.crossOriginRequestPolicy == UseAccessControl) {
+
+        InspectorInstrumentation::didReceiveCORSRedirectResponse(m_document->frame(), resource->identifier(), m_document->frame()->loader()->documentLoader(), redirectResponse, 0);
+
         bool allowRedirect = false;
+        String accessControlErrorDescription;
         if (m_simpleRequest) {
-            String accessControlErrorDescription;
             allowRedirect = SchemeRegistry::shouldTreatURLSchemeAsCORSEnabled(request.url().protocol())
                             && request.url().user().isEmpty()
                             && request.url().pass().isEmpty()
                             && (m_sameOriginRequest || passesAccessControlCheck(redirectResponse, m_options.allowCredentials, securityOrigin(), accessControlErrorDescription));
+        } else {
+            accessControlErrorDescription = "Cross Origin Requests with preflight cannot be redirected";

[Mike West, 2013/08/28 15:33:56]

A bit more detail would be nice. How about something like: "The request was
redirected to XXX, which is disallowed for cross-origin requests that require
preflight."?

[ancilgeorge, 2013/08/29 07:09:38]

Done.

         }
 
         if (allowRedirect) {
@@ -243,9 +248,12 @@ void DocumentThreadableLoader::redirectReceived(Resource* resource, ResourceRequ
             makeCrossOriginAccessRequest(request);
             return;
         }
-    }
 
-    m_client->didFailRedirectCheck();
+        ResourceError error(errorDomainWebKitInternal, 0, redirectResponse.url().string(), accessControlErrorDescription);
+        m_client->didFailAccessControlCheck(error);
+    } else {
+        m_client->didFailRedirectCheck();
+    }
     request = ResourceRequest();
 }