Http Cache: chain GetLoadState from transactions waiting for...

net/http/http_cache_transaction.h

 // Copyright (c) 2006-2010 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 79 matching lines @@
   // response (or response info) must be evaluated by the caller, for instance
   // to make sure that the response_time is as expected, before calling this
   // method.
   int WriteMetadata(IOBuffer* buf, int buf_len, CompletionCallback* callback);
 
   // This transaction is being deleted and we are not done writing to the cache.
   // We need to indicate that the response data was truncated.  Returns true on
   // success.
   bool AddTruncatedFlag();
 
+  // Returns the LoadState of the writer transaction of a given ActiveEntry. In
+  // other words, returns the LoadState of this transaction without asking the
+  // http cache, because this transaction should be the one currently writing
+  // to the cache entry.
+  LoadState GetWriterLoadState() const;
+
   CompletionCallback* io_callback() { return &io_callback_; }
 
  private:
   static const size_t kNumValidationHeaders = 2;
   // Helper struct to pair a header name with its value, for
   // headers used to validate cache entries.
   struct ValidationHeaders {
     ValidationHeaders() : initialized(false) {}
 
     std::string values[kNumValidationHeaders];
@@ skipping 227 matching lines @@
   uint64 final_upload_progress_;
   CompletionCallbackImpl<Transaction> io_callback_;
   scoped_refptr<CancelableCompletionCallback<Transaction> > cache_callback_;
   scoped_refptr<CancelableCompletionCallback<Transaction> >
       write_headers_callback_;
 };
 
 }  // namespace net
 
 #endif  // NET_HTTP_HTTP_CACHE_TRANSACTION_H_