Initialize the simple cache backend at runtime.

net/disk_cache/disk_cache.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.
 
 // Defines the public interface of the disk cache. For more details see
 // http://dev.chromium.org/developers/design-documents/network-stack/disk-cache
 
 #ifndef NET_DISK_CACHE_DISK_CACHE_H_
 #define NET_DISK_CACHE_DISK_CACHE_H_
 
@@ skipping 36 matching lines @@
 // 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).
 NET_EXPORT int CreateCacheBackend(net::CacheType type,
                                   const base::FilePath& path,
                                   int max_bytes, bool force,
                                   base::MessageLoopProxy* thread,
                                   net::NetLog* net_log, Backend** backend,
                                   const net::CompletionCallback& callback);
 
+// A version of the above with additional |flags| allowing more fine-tuned
+// testing.
+int CreateCacheBackendWithFlags(net::CacheType type,
+                                const base::FilePath& path,
+                                int max_bytes,
+                                bool force,
+                                uint32 flags,
+                                base::MessageLoopProxy* thread,
+                                net::NetLog* net_log,
+                                Backend** backend,
+                                const net::CompletionCallback& callback);
+
+// Renames cache directory synchronously and fires off a background cleanup
+// task. Used by cache creator itself or by backends for self-restart on error.
+bool DelayedCacheCleanup(const base::FilePath& full_path);
+
 // The root interface for a disk cache instance.
 class NET_EXPORT Backend {
  public:
   typedef net::CompletionCallback CompletionCallback;
 
   // 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
@@ skipping 235 matching lines @@
   // Note: This method is deprecated.
   virtual int ReadyForSparseIO(const CompletionCallback& callback) = 0;
 
  protected:
   virtual ~Entry() {}
 };
 
 }  // namespace disk_cache
 
 #endif  // NET_DISK_CACHE_DISK_CACHE_H_