Refactor JSONValueConverter Out of DisplayLayout

ash/display/json_converter.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 ASH_DISPLAY_JSON_CONVERTER_H_
+#define ASH_DISPLAY_JSON_CONVERTER_H_
+
+#include "ash/ash_export.h"
+
+namespace base {
+class Value;
+}
+
+namespace ash {
+
+class DisplayLayout;
+
+ASH_EXPORT bool JsonToDisplayLayout(const base::Value& value,
+                                    DisplayLayout* layout);
+
+ASH_EXPORT bool DisplayLayoutToJson(const DisplayLayout& layout,
+                                    base::Value* value);
+
+}  // namespace ash
+
+#endif  // ASH_DISPLAY_JSON_CONVERTER_H_