Disk Cache: Replace the backend pointer of the ChildrenDeleter...

net/disk_cache/backend_impl.cc

 // 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.
 
 #include "net/disk_cache/backend_impl.h"
 
 #include "base/field_trial.h"
 #include "base/file_path.h"
 #include "base/file_util.h"
 #include "base/histogram.h"
@@ skipping 310 matching lines @@
 // still fail if we are not able to rename the cache folder (for instance due to
 // a sharing violation), and in that case a cache for this profile (on the
 // desired path) cannot be created.
 //
 // Static.
 int BackendImpl::CreateBackend(const FilePath& full_path, bool force,
                                int max_bytes, net::CacheType type,
                                uint32 flags, base::MessageLoopProxy* thread,
                                Backend** backend,
                                CompletionCallback* callback) {
+  DCHECK(callback);
   CacheCreator* creator = new CacheCreator(full_path, force, max_bytes, type,
                                            flags, thread, backend, callback);
   // This object will self-destroy when finished.
   return creator->Run();
 }
 
 int BackendImpl::Init(CompletionCallback* callback) {
   background_queue_.Init(callback);
   return net::ERR_IO_PENDING;
 }
@@ skipping 190 matching lines @@
   timer_.Stop();
 
   if (init_) {
     if (data_)
       data_->header.crash = 0;
 
     File::WaitForPendingIO(&num_pending_io_);
     DCHECK(!num_refs_);
   }
   factory_.RevokeAll();
+  ptr_factory_.InvalidateWeakPtrs();
   done_.Signal();
 }
 
 // ------------------------------------------------------------------------
 
 int BackendImpl::OpenPrevEntry(void** iter, Entry** prev_entry,
                                CompletionCallback* callback) {
   DCHECK(callback);
   background_queue_.OpenPrevEntry(iter, prev_entry, callback);
   return net::ERR_IO_PENDING;
@@ skipping 1307 matching lines @@
 
   return num_dirty;
 }
 
 bool BackendImpl::CheckEntry(EntryImpl* cache_entry) {
   RankingsNode* rankings = cache_entry->rankings()->Data();
   return !rankings->dummy;
 }
 
 }  // namespace disk_cache