DomStorageArea -> DomStorageDatabase indirection; add *StorageDatabaseAdapter.

webkit/dom_storage/session_storage_database_adapter.cc

Index: webkit/dom_storage/session_storage_database_adapter.cc
diff --git a/webkit/dom_storage/session_storage_database_adapter.cc b/webkit/dom_storage/session_storage_database_adapter.cc
new file mode 100644
index 0000000000000000000000000000000000000000..6fd3d2ddcf7448461c99da85768da59671b52304
--- /dev/null
+++ b/webkit/dom_storage/session_storage_database_adapter.cc
@@ -0,0 +1,32 @@
+// 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 "webkit/dom_storage/session_storage_database_adapter.h"
+
+#include "webkit/dom_storage/session_storage_database.h"
+
+namespace dom_storage {
+
+SessionStorageDatabaseAdapter::SessionStorageDatabaseAdapter(
+    SessionStorageDatabase* db,
+    const std::string& namespace_id,
+    const GURL& origin)
+    : db_(db),
+      namespace_id_(namespace_id),
+      origin_(origin) {
+}
+
+SessionStorageDatabaseAdapter::~SessionStorageDatabaseAdapter() { }
+
+void SessionStorageDatabaseAdapter::ReadAllValues(ValuesMap* result) {
+  db_->ReadAreaValues(namespace_id_, origin_, result);
+}
+
+bool SessionStorageDatabaseAdapter::CommitChanges(
+    bool clear_all_first, const ValuesMap& changes) {
+  return db_->CommitAreaChanges(namespace_id_, origin_,
+                                clear_all_first, changes);
+}
+
+}  // namespace dom_storage