CHECK that URLRequestJobs are not orphaned while blocked by extensions.

net/url_request/url_request.cc

Index: net/url_request/url_request.cc
diff --git a/net/url_request/url_request.cc b/net/url_request/url_request.cc
index c12f9d1ea26d83a49569b8d8945c07efbbd585c2..54842e4db68864b39bb4b78990c431b9ebb22ca9 100644
--- a/net/url_request/url_request.cc
+++ b/net/url_request/url_request.cc
@@ -875,6 +875,9 @@ void URLRequest::PrepareToRestart() {
 }
 
 void URLRequest::OrphanJob() {
+  if (network_delegate_)
+    network_delegate_->NotifyURLRequestJobOrphaned(this);
+
   // When calling this function, please check that URLRequestHttpJob is
   // not in between calling NetworkDelegate::NotifyHeadersReceived receiving
   // the call back. This is currently guaranteed by the following strategies: