First pass at adding http/backend cache to NetLog

net/disk_cache/disk_cache.h

 // Copyright (c) 2006-2010 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.
 
 // Defines the public interface of the disk cache. For more details see
 // http://dev.chromium.org/developers/design-documents/disk-cache
 
 #ifndef NET_DISK_CACHE_DISK_CACHE_H_
 #define NET_DISK_CACHE_DISK_CACHE_H_
 #pragma once
 
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/time.h"
 #include "net/base/cache_type.h"
 #include "net/base/completion_callback.h"
 
 class FilePath;
 
 namespace base {
 class MessageLoopProxy;
 }
 
 namespace net {
+class BoundNetLog;
 class IOBuffer;
+class NetLog;
 }
 
 namespace disk_cache {
 
 class Entry;
 class Backend;
 typedef net::CompletionCallback CompletionCallback;
 
 // Returns an instance of a Backend of the given |type|. |path| points to a
 // folder where the cached data will be stored (if appropriate). This cache
 // instance must be the only object that will be reading or writing files to
 // that folder. The returned object should be deleted when not needed anymore.
 // If |force| is true, and there is a problem with the cache initialization, the
 // files will be deleted and a new set will be created. |max_bytes| is the
 // maximum size the cache can grow to. If zero is passed in as |max_bytes|, the
 // cache will determine the value to use. |thread| can be used to perform IO
 // operations if a dedicated thread is required; a valid value is expected for
 // any backend that performs operations on a disk. The returned pointer can be
 // NULL if a fatal error is found. The actual return value of the function is a
 // net error code. If this function returns ERR_IO_PENDING, the |callback| will
 // be invoked when a backend is available or a fatal error condition is reached.
 // The pointer to receive the |backend| must remain valid until the operation
 // completes (the callback is notified).
 int CreateCacheBackend(net::CacheType type, const FilePath& path, int max_bytes,
                        bool force, base::MessageLoopProxy* thread,
-                       Backend** backend, CompletionCallback* callback);
+                       net::NetLog* net_log, Backend** backend,
+                       CompletionCallback* callback);
 
 // The root interface for a disk cache instance.
 class Backend {
  public:
   // If the backend is destroyed when there are operations in progress (any
   // callback that has not been invoked yet), this method cancels said
   // operations so the callbacks are not invoked, possibly leaving the work
   // half way (for instance, dooming just a few entries). Note that pending IO
   // for a given Entry (as opposed to the Backend) will still generate a
   // callback from within this method.
@@ skipping 223 matching lines @@
   // Note: This method is deprecated.
   virtual int ReadyForSparseIO(CompletionCallback* completion_callback) = 0;
 
  protected:
   virtual ~Entry() {}
 };
 
 }  // namespace disk_cache
 
 #endif  // NET_DISK_CACHE_DISK_CACHE_H_