DomStorageArea -> DomStorageDatabase indirection; add *StorageDatabaseAdapter.

webkit/dom_storage/dom_storage_area.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.
 
 #ifndef WEBKIT_DOM_STORAGE_DOM_STORAGE_AREA_H_
 #define WEBKIT_DOM_STORAGE_DOM_STORAGE_AREA_H_
 #pragma once
 
 #include "base/file_path.h"
 #include "base/gtest_prod_util.h"
 #include "base/memory/ref_counted.h"
+#include "base/memory/scoped_ptr.h"
 #include "base/nullable_string16.h"
 #include "base/string16.h"
 #include "googleurl/src/gurl.h"
-#include "webkit/dom_storage/dom_storage_database.h"
 #include "webkit/dom_storage/dom_storage_types.h"
 
 namespace dom_storage {
 
+class DomStorageDatabaseAdapter;
 class DomStorageMap;
 class DomStorageTaskRunner;
 
 // Container for a per-origin Map of key/value pairs potentially
 // backed by storage on disk and lazily commits changes to disk.
 // See class comments for DomStorageContext for a larger overview.
 class DomStorageArea
     : public base::RefCountedThreadSafe<DomStorageArea> {
 
  public:
@@ skipping 81 matching lines @@
   void OnCommitComplete();
 
   void ShutdownInCommitSequence();
 
   int64 namespace_id_;
   std::string persistent_namespace_id_;
   GURL origin_;
   FilePath directory_;
   scoped_refptr<DomStorageTaskRunner> task_runner_;
   scoped_refptr<DomStorageMap> map_;
-  scoped_ptr<DomStorageDatabase> backing_;
+  scoped_ptr<DomStorageDatabaseAdapter> backing_;
   bool is_initial_import_done_;
   bool is_shutdown_;
   scoped_ptr<CommitBatch> commit_batch_;
   int commit_batches_in_flight_;
 };
 
 }  // namespace dom_storage
 
 #endif  // WEBKIT_DOM_STORAGE_DOM_STORAGE_AREA_H_