Fixes the cache lock issue.

net/http/http_transaction.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef NET_HTTP_HTTP_TRANSACTION_H_
 #define NET_HTTP_HTTP_TRANSACTION_H_
 
 #include <stdint.h>
 
 #include "net/base/completion_callback.h"
@@ skipping 54 matching lines @@
   // Regardless of the return value, the caller is expected to keep the
   // request_info object alive until Destroy is called on the transaction.
   //
   // NOTE: The transaction is not responsible for deleting the callback object.
   //
   // Profiling information for the request is saved to |net_log| if non-NULL.
   virtual int Start(const HttpRequestInfo* request_info,
                     const CompletionCallback& callback,
                     const NetLogWithSource& net_log) = 0;
 
+  // Ownership of the transaction is transferred from the consumer to the

[jkarlin, 2016/12/06 18:08:18]

s/from the consumer to the transaction/to the transaction itself/.

[shivanisha, 2016/12/06 21:53:35]

done.

+  // transaction. It can be either reset in the method or reset can be deferred
+  // if some asynchronous operation is in progress.
+  virtual void Orphan(std::unique_ptr<HttpTransaction> trans) = 0;

[jkarlin, 2016/12/06 18:08:18]

Let's move this method to the bottom of the public API as this is about cleanup
and not the primary interface readers are looking for.

[shivanisha, 2016/12/06 21:53:35]

done.

+
   // Restarts the HTTP transaction, ignoring the last error.  This call can
   // only be made after a call to Start (or RestartIgnoringLastError) failed.
   // Once Read has been called, this method cannot be called.  This method is
   // used, for example, to continue past various SSL related errors.
   //
   // Not all errors can be ignored using this method.  See error code
   // descriptions for details about errors that can be ignored.
   //
   // NOTE: The transaction is not responsible for deleting the callback object.
   //
@@ skipping 107 matching lines @@
 
   // Resumes the transaction after being deferred.
   virtual int ResumeNetworkStart() = 0;
 
   virtual void GetConnectionAttempts(ConnectionAttempts* out) const = 0;
 };
 
 }  // namespace net
 
 #endif  // NET_HTTP_HTTP_TRANSACTION_H_