Revert of CHECK that URLRequestJobs are not orphaned while blocked by extensions.

net/base/network_delegate.cc

Index: net/base/network_delegate.cc
diff --git a/net/base/network_delegate.cc b/net/base/network_delegate.cc
index 6cf7c96edf25951034645045d70742c8de3fa3d9..200905ecd1ef5e8b4f7f79ff2bb175367d0ac382 100644
--- a/net/base/network_delegate.cc
+++ b/net/base/network_delegate.cc
@@ -125,12 +125,6 @@ void NetworkDelegate::NotifyURLRequestDestroyed(URLRequest* request) {
   OnURLRequestDestroyed(request);
 }
 
-void NetworkDelegate::NotifyURLRequestJobOrphaned(URLRequest* request) {
-  DCHECK(CalledOnValidThread());
-  DCHECK(request);
-  OnURLRequestJobOrphaned(request);
-}
-
 void NetworkDelegate::NotifyPACScriptError(int line_number,
                                            const base::string16& error) {
   DCHECK(CalledOnValidThread());