Initialize the simple cache backend at runtime.

net/disk_cache/simple/simple_backend_impl.h

 // Copyright (c) 2013 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_SIMPLE_SIMPLE_BACKEND_IMPL_H_
 #define NET_DISK_CACHE_SIMPLE_SIMPLE_BACKEND_IMPL_H_
 
 #include <string>
 #include <utility>
 #include <vector>
@@ skipping 12 matching lines @@
 // It is currently a work in progress, missing many features of a real cache,
 // such as eviction.
 
 // See http://www.chromium.org/developers/design-documents/network-stack/disk-cache/very-simple-backend
 
 class SimpleBackendImpl : public Backend {
  public:
   virtual ~SimpleBackendImpl();
 
   static int CreateBackend(const base::FilePath& full_path,
-                           bool force,
                            int max_bytes,
                            net::CacheType type,
                            uint32 flags,
                            scoped_refptr<base::TaskRunner> thread,
                            net::NetLog* net_log,
                            Backend** backend,
                            const CompletionCallback& callback);
 
   // From Backend:
   virtual net::CacheType GetCacheType() const OVERRIDE;
@@ skipping 34 matching lines @@
                                  const base::FilePath& path,
                                  const CompletionCallback& callback,
                                  Backend** backend);
 
   const base::FilePath path_;
 };
 
 }  // namespace disk_cache
 
 #endif  // NET_DISK_CACHE_SIMPLE_SIMPLE_BACKEND_IMPL_H_