Port IndexedDB open() and database callbacks to Mojo.

content/common/indexed_db/indexed_db_database_error_struct_traits.h

+// Copyright 2016 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 CONTENT_COMMON_INDEXED_DB_INDEXED_DB_DATABASE_ERROR_STRUCT_TRAITS_H_
+#define CONTENT_COMMON_INDEXED_DB_INDEXED_DB_DATABASE_ERROR_STRUCT_TRAITS_H_
+
+#include "content/common/indexed_db/indexed_db_database_error.h"
+#include "third_party/WebKit/public/platform/modules/indexeddb/indexed_db.mojom.h"
+
+namespace mojo {
+
+template <>
+struct StructTraits<indexed_db::mojom::ErrorInfoDataView,
+                    content::IndexedDBDatabaseError> {
+  static int16_t code(const content::IndexedDBDatabaseError& error) {
+    return error.code();
+  }
+  static const base::string16& message(
+      const content::IndexedDBDatabaseError& error) {
+    return error.message();
+  }
+
+  static bool Read(indexed_db::mojom::ErrorInfoDataView data,
+                   content::IndexedDBDatabaseError* out) {
+    base::string16 message;
+    if (!data.ReadMessage(&message))
+      return false;
+
+    *out = content::IndexedDBDatabaseError(data.code(), message);
+    return true;
+  }
+};
+
+}  // namespace mojo
+
+#endif  // CONTENT_COMMON_INDEXED_DB_INDEXED_DB_DATABASE_ERROR_STRUCT_TRAITS_H_