Retry HttpNetworkTransactions upon receipt of ERR_NETWORK_CHANGED during host resolution and …

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 596fb7edf87911c41a8e695df5c8bd1ed4b9ff45..956bcb42b8e7d97a441be0149055b1804b02c8ac 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"
@@ -339,6 +340,15 @@ class NET_EXPORT_PRIVATE HttpNetworkTransaction
 
   BeforeNetworkStartCallback before_network_start_callback_;
 
+  // How many times have we automatically retried this request after failing
+  // with ERR_NETWORK_CHANGED. Retrying is only attempted when
+  // ERR_NETWORK_CHANGED is received during host resolution or connecting
+  // (i.e. before the request has been issued). This ensures request
+  // side-effects are never duplicated.
+  int num_automatic_retries_on_network_changes_;
+
+  base::WeakPtrFactory<HttpNetworkTransaction> weak_factory_;
+
   DISALLOW_COPY_AND_ASSIGN(HttpNetworkTransaction);
 };