Make aura work with mus

ui/aura/mus/property_converter.h

Index: ui/aura/mus/property_converter.h
diff --git a/ui/aura/mus/property_converter.h b/ui/aura/mus/property_converter.h
new file mode 100644
index 0000000000000000000000000000000000000000..dc0656562586eed2ede8af0660f699ccbe786787
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+++ b/ui/aura/mus/property_converter.h
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+// 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 UI_AURA_MUS_PROPERTY_CONVERTER_H_
+#define UI_AURA_MUS_PROPERTY_CONVERTER_H_
+
+#include <stdint.h>
+
+#include <memory>
+#include <string>
+#include <vector>
+
+#include "ui/aura/aura_export.h"
+
+namespace aura {
+
+class Window;
+
+// PropertyConverter is used to convert Window properties for transport to the
+// mus window server and back. Any time a property changes from one side it is
+// mapped to the other using this class. Not all Window properties need to map
+// to server properties, and similarly not all transport properties need map to
+// Window properties.
+class PropertyConverter {
+ public:
+  virtual ~PropertyConverter() {}
+
+  // Maps a property on the Window to a property pushed to the server. Return
+  // true if the property should be sent to the server, false if the property
+  // is only used locally.
+  virtual bool ConvertPropertyForTransport(
+      Window* window,
+      const void* key,
+      std::string* transport_name,
+      std::unique_ptr<std::vector<uint8_t>>* transport_value) = 0;
+
+  // Returns the transport name for a Window property.
+  virtual std::string GetTransportNameForPropertyKey(const void* key) = 0;
+
+  // Applies a value from the server to |window|. |transport_name| is the
+  // name of the property and |transport_data| the value. |transport_data| may
+  // be null.
+  virtual void SetPropertyFromTransportValue(
+      Window* window,
+      const std::string& transport_name,
+      const std::vector<uint8_t>* transport_data) = 0;
+};
+
+}  // namespace aura
+
+#endif  // UI_AURA_MUS_PROPERTY_CONVERTER_H_