Allow the content browser client to specify a special cookie store to be

webkit/browser/blob/blob_url_request_job_factory.cc

Index: webkit/browser/blob/blob_url_request_job_factory.cc
===================================================================
--- webkit/browser/blob/blob_url_request_job_factory.cc	(revision 255909)
+++ webkit/browser/blob/blob_url_request_job_factory.cc	(working copy)
@@ -35,7 +35,7 @@
     net::URLRequest::Delegate* request_delegate) {
   const GURL kBlobUrl("blob://see_user_data/");
   scoped_ptr<net::URLRequest> request = request_context->CreateRequest(
-      kBlobUrl, net::DEFAULT_PRIORITY, request_delegate);
+      kBlobUrl, net::DEFAULT_PRIORITY, request_delegate, NULL);
   SetRequestedBlobDataHandle(request.get(), blob_data_handle.Pass());
   return request.Pass();
 }