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

net/http/http_cache.cc

 // Copyright (c) 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.
 
 #include "net/http/http_cache.h"
 
 #include <algorithm>
 
 #include "base/compiler_specific.h"
 
@@ skipping 757 matching lines @@
   DCHECK(entry->readers.empty());
 
   Transaction* trans = entry->writer;
 
   entry->writer = NULL;
   entry->readers.push_back(trans);
 
   ProcessPendingQueue(entry);
 }
 
+LoadState HttpCache::GetLoadStateForPendingTransaction(
+      const Transaction* trans) {
+  ActiveEntriesMap::const_iterator i = active_entries_.find(trans->key());
+  if (i == active_entries_.end()) {
+    // If this is really a pending transaction, and it is not part of
+    // active_entries_, we should be creating the backend or the entry.
+    return LOAD_STATE_WAITING_FOR_CACHE;
+  }
+
+  Transaction* writer = i->second->writer;
+  return writer->GetWriterLoadState();
+}
+
 void HttpCache::RemovePendingTransaction(Transaction* trans) {
   ActiveEntriesMap::const_iterator i = active_entries_.find(trans->key());
   bool found = false;
   if (i != active_entries_.end())
     found = RemovePendingTransactionFromEntry(i->second, trans);
 
   if (found)
     return;
 
   if (building_backend_) {
@@ skipping 199 matching lines @@
     // This could be an external caller or a transaction waiting on Start().
     pending_item->DoCallback(result, temp_backend_);
     pending_item->NotifyTransaction(result, NULL);
   }
 
   DeletePendingOp(pending_op);
   building_backend_ = false;
 }
 
 }  // namespace net