net: Bind WeakPtr to HttpNetworkTransaction::io_callback_

net/http/http_network_transaction.h

Index: net/http/http_network_transaction.h
diff --git a/net/http/http_network_transaction.h b/net/http/http_network_transaction.h
index 6228487e615dc2a7f0642492980da1c5e3b21422..b99f0c34f2941fbad3bbbbdad6a3526766f08e5a 100644
--- a/net/http/http_network_transaction.h
+++ b/net/http/http_network_transaction.h
@@ -11,6 +11,7 @@
 #include "base/gtest_prod_util.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
+#include "base/memory/weak_ptr.h"
 #include "base/time/time.h"
 #include "net/base/net_log.h"
 #include "net/base/request_priority.h"
@@ -306,6 +307,8 @@ class NET_EXPORT_PRIVATE HttpNetworkTransaction
   // read from the socket until the tunnel is done.
   bool establishing_tunnel_;
 
+  base::WeakPtrFactory<HttpNetworkTransaction> weak_ptr_factory_;
+
   DISALLOW_COPY_AND_ASSIGN(HttpNetworkTransaction);
 };