Cache Backend Proxy to intercept all cache events from the IO thread.

net/disk_cache/in_flight_backend_io.h

 // Copyright (c) 2012 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_IN_FLIGHT_BACKEND_IO_H_
 #define NET_DISK_CACHE_IN_FLIGHT_BACKEND_IO_H_
 
 #include <list>
 #include <string>
 
@@ skipping 56 matching lines @@
   void WriteData(EntryImpl* entry, int index, int offset, net::IOBuffer* buf,
                  int buf_len, bool truncate);
   void ReadSparseData(EntryImpl* entry, int64 offset, net::IOBuffer* buf,
                       int buf_len);
   void WriteSparseData(EntryImpl* entry, int64 offset, net::IOBuffer* buf,
                        int buf_len);
   void GetAvailableRange(EntryImpl* entry, int64 offset, int len, int64* start);
   void CancelSparseIO(EntryImpl* entry);
   void ReadyForSparseIO(EntryImpl* entry);
 
- private:
   // There are two types of operations to proxy: regular backend operations are
   // executed sequentially (queued by the message loop). On the other hand,
   // operations targeted to a given entry can be long lived and support multiple
   // simultaneous users (multiple reads or writes to the same entry), and they
   // are subject to throttling, so we keep an explicit queue.
   enum Operation {
     OP_NONE = 0,
     OP_INIT,
     OP_OPEN,
     OP_CREATE,
@@ skipping 11 matching lines @@
     OP_RUN_TASK,
     OP_MAX_BACKEND,
     OP_READ,
     OP_WRITE,
     OP_READ_SPARSE,
     OP_WRITE_SPARSE,
     OP_GET_RANGE,
     OP_CANCEL_IO,
     OP_IS_READY
   };
+ private:

[rvargas (doing something else), 2013/04/05 19:25:13]

nit: move one line down (emty line before, not after).

[pasko-google - do not use, 2013/04/09 11:53:17]

Done.

 
   virtual ~BackendIO();
 
   // Returns true if this operation returns an entry.
   bool ReturnsEntry();
 
   // Returns the time that has passed since the operation was created.
   base::TimeDelta ElapsedTime() const;
 
   void ExecuteBackendOperation();
@@ skipping 95 matching lines @@
   BackendImpl* backend_;
   scoped_refptr<base::MessageLoopProxy> background_thread_;
   base::WeakPtrFactory<InFlightBackendIO> ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(InFlightBackendIO);
 };
 
 }  // namespace disk_cache
 
 #endif  // NET_DISK_CACHE_IN_FLIGHT_BACKEND_IO_H_