Disk cache: Fix handling of invalid entries that are detected...

net/disk_cache/storage_block.h

 // Copyright (c) 2006-2008 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.
 
 // See net/disk_cache/disk_cache.h for the public interface.
 
 #ifndef NET_DISK_CACHE_STORAGE_BLOCK_H__
 #define NET_DISK_CACHE_STORAGE_BLOCK_H__
 
 #include "net/disk_cache/addr.h"
@@ skipping 25 matching lines @@
   virtual ~StorageBlock();
 
   // FileBlock interface.
   virtual void* buffer() const;
   virtual size_t size() const;
   virtual int offset() const;
 
   // Allows the overide of dummy values passed on the constructor.
   bool LazyInit(MappedFile* file, Addr address);
 
-  // Sets the internal storage to share the momory provided by other instance.
+  // Sets the internal storage to share the memory provided by other instance.
   void SetData(T* other);
 
+  // Deletes the data, even if it was modified and not saved. This object must
+  // own the memory buffer (it cannot be shared).
+  void Discard();
+
   // Sets the object to lazily save the in-memory data on destruction.
   void set_modified();
 
   // Gets a pointer to the internal storage (allocates storage if needed).
   T* Data();
 
   // Returns true if there is data associated with this object.
   bool HasData() const;
 
   const Addr address() const;
@@ skipping 15 matching lines @@
 
   DISALLOW_EVIL_CONSTRUCTORS(StorageBlock);
 };
 
 typedef StorageBlock<EntryStore> CacheEntryBlock;
 typedef StorageBlock<RankingsNode> CacheRankingsBlock;
 
 }  // namespace disk_cache
 
 #endif  // NET_DISK_CACHE_STORAGE_BLOCK_H__