Disk cache: Add base files for implementation of file format version 3.

net/disk_cache/v3/entry_impl_v3.h

Index: net/disk_cache/v3/entry_impl_v3.h
===================================================================
--- net/disk_cache/v3/entry_impl_v3.h	(revision 0)
+++ net/disk_cache/v3/entry_impl_v3.h	(working copy)
@@ -51,46 +51,18 @@
   void CancelSparseIOImpl();
   int ReadyForSparseIOImpl(const CompletionCallback& callback);
 
-  inline CacheEntryBlock* entry() {
-    return &entry_;
-  }
-
-  inline CacheRankingsBlock* rankings() {
-    return &node_;
-  }
-
-  uint32 GetHash();
-
   // Performs the initialization of a EntryImpl that will be added to the
   // cache.
   bool CreateEntry(Addr node_address, const std::string& key, uint32 hash);
 
+  uint32 GetHash();
+
   // Returns true if this entry matches the lookup arguments.
   bool IsSameEntry(const std::string& key, uint32 hash);
 
   // Permamently destroys this entry.
   void InternalDoom();
 
-  // Deletes this entry from disk. If |everything| is false, only the user data
-  // will be removed, leaving the key and control data intact.
-  void DeleteEntryData(bool everything);
-
-  // Returns the address of the next entry on the list of entries with the same
-  // hash.
-  CacheAddr GetNextAddress();
-
-  // Sets the address of the next entry on the list of entries with the same
-  // hash.
-  void SetNextAddress(Addr address);
-
-  // Reloads the rankings node information.
-  bool LoadNodeAddress();
-
-  // Updates the stored data to reflect the run-time information for this entry.
-  // Returns false if the data could not be updated. The purpose of this method
-  // is to be able to detect entries that are currently in use.
-  bool Update();
-
   bool dirty() {
     return dirty_;
   }
@@ -99,17 +71,6 @@
     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();
@@ -117,21 +78,10 @@
   // Attempts to make this entry reachable though the key.
   void FixForDelete();
 
-  // Handle the pending asynchronous IO count.
-  void IncrementIoCount();
-  void DecrementIoCount();
-
-  // This entry is being returned to the user. It is always called from the
-  // primary thread (not the dedicated cache thread).
-  void OnEntryCreated(BackendImpl* backend);
-
   // 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.
-  void ReportIOTime(Operation op, const base::TimeTicks& start);
-
   // Logs a begin event and enables logging for the EntryImpl.  Will also cause
   // an end event to be logged on destruction.  The EntryImpl must have its key
   // initialized before this is called.  |created| is true if the Entry was
@@ -140,9 +90,6 @@
 
   const net::BoundNetLog& net_log() const;
 
-  // Returns the number of blocks needed to store an EntryStore.
-  static int NumBlocksForEntry(int key_size);
-
   // Entry interface.
   virtual void Doom() OVERRIDE;
   virtual void Close() OVERRIDE;
@@ -195,12 +142,10 @@
   // Updates ranking information.
   void UpdateRank(bool modified);
 
-  // Returns a pointer to the file that stores the given address.
-  File* GetBackingFile(Addr address, int index);
+  // Deletes this entry from disk. If |everything| is false, only the user data
+  // will be removed, leaving the key and control data intact.
+  void DeleteEntryData(bool everything);
 
-  // Returns a pointer to the file that stores external data.
-  File* GetExternalFile(Addr address, int index);
-
   // Prepares the target file or buffer for a write of buf_len bytes at the
   // given offset.
   bool PrepareTarget(int index, int offset, int buf_len, bool truncate);
@@ -248,6 +193,9 @@
   // actual cleanup.
   void GetData(int index, char** buffer, Addr* address);
 
+  // Generates a histogram for the time spent working on this operation.
+  void ReportIOTime(Operation op, const base::TimeTicks& start);
+
   // Logs this entry to the internal trace buffer.
   void Log(const char* msg);