IndexedDB: Fixed support for empty blobs.

content/browser/indexed_db/indexed_db_context_impl.cc

 // 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.
 
 #include "content/browser/indexed_db/indexed_db_context_impl.h"
 
 #include <algorithm>
 #include <utility>
 
 #include "base/bind.h"
@@ skipping 255 matching lines @@
         database_list->Append(db_info.release());
       }
       info->Set("databases", database_list.release());
     }
 
     list->Append(info.release());
   }
   return list.release();
 }
 
+int IndexedDBContextImpl::GetOriginBlobFileCount(const GURL& origin_url) {
+  DCHECK(TaskRunner()->RunsTasksOnCurrentThread());
+  int count = 0;
+  base::FileEnumerator file_enumerator(
+      GetBlobPath(storage::GetIdentifierFromOrigin(origin_url)), true,
+      base::FileEnumerator::FILES);
+  for (base::FilePath file_path = file_enumerator.Next(); !file_path.empty();
+       file_path = file_enumerator.Next()) {
+    count++;
+  }
+  return count;
+}
+
 int64 IndexedDBContextImpl::GetOriginDiskUsage(const GURL& origin_url) {
   DCHECK(TaskRunner()->RunsTasksOnCurrentThread());
   if (data_path_.empty() || !IsInOriginSet(origin_url))
     return 0;
   EnsureDiskUsageCacheInitialized(origin_url);
   return origin_size_map_[origin_url];
 }
 
 base::Time IndexedDBContextImpl::GetOriginLastModified(const GURL& origin_url) {
   DCHECK(TaskRunner()->RunsTasksOnCurrentThread());
@@ skipping 317 matching lines @@
   origin_set_.reset();
   origin_size_map_.clear();
   space_available_map_.clear();
 }
 
 base::SequencedTaskRunner* IndexedDBContextImpl::TaskRunner() const {
   return task_runner_.get();
 }
 
 }  // namespace content