Disk cache: Don't evict entries if we are busy doing other stuff....

net/disk_cache/eviction.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.
 
 #ifndef NET_DISK_CACHE_EVICTION_H_
 #define NET_DISK_CACHE_EVICTION_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/task.h"
@@ skipping 22 matching lines @@
   // Updates the ranking information for an entry.
   void UpdateRank(EntryImpl* entry, bool modified);
 
   // Notifications of interesting events for a given entry.
   void OnOpenEntry(EntryImpl* entry);
   void OnCreateEntry(EntryImpl* entry);
   void OnDoomEntry(EntryImpl* entry);
   void OnDestroyEntry(EntryImpl* entry);
 
  private:
+  void PostDelayedTrim();
+  void DelayedTrim();
   void ReportTrimTimes(EntryImpl* entry);
   Rankings::List GetListForEntry(EntryImpl* entry);
   bool EvictEntry(CacheRankingsBlock* node, bool empty);
 
   // We'll just keep for a while a separate set of methods that implement the
   // new eviction algorithm. This code will replace the original methods when
   // finished.
   void TrimCacheV2(bool empty);
   void UpdateRankV2(EntryImpl* entry, bool modified);
   void OnOpenEntryV2(EntryImpl* entry);
   void OnCreateEntryV2(EntryImpl* entry);
   void OnDoomEntryV2(EntryImpl* entry);
   void OnDestroyEntryV2(EntryImpl* entry);
   Rankings::List GetListForEntryV2(EntryImpl* entry);
   void TrimDeleted(bool empty);
   bool RemoveDeletedNode(CacheRankingsBlock* node);
 
   bool NodeIsOldEnough(CacheRankingsBlock* node, int list);
   int SelectListByLenght();
   void ReportListStats();
 
   BackendImpl* backend_;
   Rankings* rankings_;
   IndexHeader* header_;
   int max_size_;
   bool new_eviction_;
   bool first_trim_;
   bool trimming_;
+  bool delay_trim_;
   ScopedRunnableMethodFactory<Eviction> factory_;
 
   DISALLOW_COPY_AND_ASSIGN(Eviction);
 };
 
 }  // namespace disk_cache
 
 #endif  // NET_DISK_CACHE_EVICTION_H_