Http cache: Make sure that issuing a byte range request

net/http/http_cache_transaction.h

 // Copyright (c) 2012 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.
 
 // This file declares HttpCache::Transaction, a private class of HttpCache so
 // it should only be included by http_cache.cc
 
 #ifndef NET_HTTP_HTTP_CACHE_TRANSACTION_H_
 #define NET_HTTP_HTTP_CACHE_TRANSACTION_H_
 
@@ skipping 308 matching lines @@
   void DoomPartialEntry(bool delete_object);
 
   // Performs the needed work after receiving data from the network, when
   // working with range requests.
   int DoPartialNetworkReadCompleted(int result);
 
   // Performs the needed work after receiving data from the cache, when
   // working with range requests.
   int DoPartialCacheReadCompleted(int result);
 
+  // Restarts this transaction after deleting the cached data. It is meant to
+  // be used when the current request cannot be fulfilled due to conflicts
+  // between the byte range request and the cached entry.
+  int DoRestartPartialRequest();
+
   // Returns true if we should bother attempting to resume this request if it
   // is aborted while in progress. If |has_data| is true, the size of the stored
   // data is considered for the result.
   bool CanResume(bool has_data);
 
   // Called to signal completion of asynchronous IO.
   void OnIOComplete(int result);
 
   State next_state_;
   const HttpRequestInfo* request_;
@@ skipping 30 matching lines @@
   int write_len_;
   scoped_ptr<PartialData> partial_;  // We are dealing with range requests.
   uint64 final_upload_progress_;
   base::WeakPtrFactory<Transaction> weak_factory_;
   CompletionCallback io_callback_;
 };
 
 }  // namespace net
 
 #endif  // NET_HTTP_HTTP_CACHE_TRANSACTION_H_