Disk Cache: Improve handling of dirty entries.

net/disk_cache/entry_impl.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_DISK_CACHE_ENTRY_IMPL_H_
 #define NET_DISK_CACHE_ENTRY_IMPL_H_
 #pragma once
 
 #include "base/memory/scoped_ptr.h"
 #include "net/base/net_log.h"
@@ skipping 86 matching lines @@
     return doomed_;
   }
 
   // Marks this entry as dirty (in memory) if needed. This is intended only for
   // entries that are being read from disk, to be called during loading.
   void SetDirtyFlag(int32 current_id);
 
   // Fixes this entry so it can be treated as valid (to delete it).
   void SetPointerForInvalidEntry(int32 new_id);
 
+  // Returns true if this entry is so meesed up that not everything is going to
+  // be removed.
+  bool LeaveRankingsBehind();
+
   // Returns false if the entry is clearly invalid.
   bool SanityCheck();
+  bool DataSanityCheck();
+
+  // Attempts to make this entry reachable though the key.
+  void FixForDelete();
 
   // Handle the pending asynchronous IO count.
   void IncrementIoCount();
   void DecrementIoCount();
 
   // Set the access times for this entry. This method provides support for
   // the upgrade tool.
   void SetTimes(base::Time last_used, base::Time last_modified);
 
   // Generates a histogram for the time spent working on this operation.
@@ skipping 132 matching lines @@
   scoped_ptr<SparseControl> sparse_;  // Support for sparse entries.
 
   net::BoundNetLog net_log_;
 
   DISALLOW_COPY_AND_ASSIGN(EntryImpl);
 };
 
 }  // namespace disk_cache
 
 #endif  // NET_DISK_CACHE_ENTRY_IMPL_H_