Fix a minor style nit. Make a comment clearer.

net/http/http_network_transaction.cc

Index: net/http/http_network_transaction.cc
===================================================================
--- net/http/http_network_transaction.cc	(revision 8904)
+++ net/http/http_network_transaction.cc	(working copy)
@@ -1242,12 +1242,11 @@
     DCHECK(user_callback_);
     PrepareForAuthRestart(target);
     return WILL_RESTART_TRANSACTION;
-  } else {
-    // We have exhausted all identity possibilities, all we can do now is
-    // pass the challenge information back to the client.
-    PopulateAuthChallenge(target);
   }
 
+  // We have exhausted all identity possibilities, all we can do now is
+  // pass the challenge information back to the client.
+  PopulateAuthChallenge(target);
   return OK;
 }