Adds a couple more properties to the property converter

ui/aura/mus/property_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 UI_AURA_MUS_PROPERTY_CONVERTER_H_
 #define UI_AURA_MUS_PROPERTY_CONVERTER_H_
 
 #include <stdint.h>
 
 #include <map>
 #include <memory>
 #include <string>
 #include <vector>
 
 #include "base/macros.h"
 #include "ui/aura/aura_export.h"
 #include "ui/aura/window.h"
 
 namespace gfx {
 class Rect;
+class Size;
 }
 
 namespace aura {
 
 // 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 AURA_EXPORT PropertyConverter {
  public:
+  // All primitive values are stored using this type.
+  using PrimitiveType = int64_t;
+
   PropertyConverter();
   ~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.
   bool ConvertPropertyForTransport(
       Window* window,
       const void* key,
       std::string* transport_name,
       std::unique_ptr<std::vector<uint8_t>>* transport_value);
 
   // Returns the transport name for a Window property.
   std::string GetTransportNameForPropertyKey(const void* key);
 
   // 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.
   void SetPropertyFromTransportValue(
       Window* window,
       const std::string& transport_name,
       const std::vector<uint8_t>* transport_data);
 
+  // Returns the value for a particular transport value. All primitives are
+  // serialized as a PrimitiveType, so this function may be used for any
+  // primitive. Returns true on success and sets |value| accordingly. A return
+  // value of false indicates the value isn't known or the property type isn't
+  // primitive.
+  bool GetPropertyValueFromTransportValue(
+      const std::string& transport_name,
+      const std::vector<uint8_t>& transport_data,
+      PrimitiveType* value);
+
   // Register a property to support conversion between mus and aura.
   template<typename T>
   void RegisterProperty(const WindowProperty<T>* property,
                         const char* transport_name) {
     primitive_properties_[property] =
         PropertyNames(property->name, transport_name);
   }
 
   // Specializations for properties to pointer types supporting mojo conversion.
   void RegisterProperty(const WindowProperty<gfx::ImageSkia*>* property,
                         const char* transport_name);
   void RegisterProperty(const WindowProperty<gfx::Rect*>* property,
                         const char* transport_name);
+  void RegisterProperty(const WindowProperty<gfx::Size*>* property,
+                        const char* transport_name);
   void RegisterProperty(const WindowProperty<std::string*>* property,
                         const char* transport_name);
   void RegisterProperty(const WindowProperty<base::string16*>* property,
                         const char* transport_name);
 
  private:
   // A pair with the aura::WindowProperty::name and the mus property name.
   using PropertyNames = std::pair<const char*, const char*>;
   // A map of aura::WindowProperty<T> to its aura and mus property names.
   // This supports the internal codepaths for primitive types, eg. T=bool.
   std::map<const void*, PropertyNames> primitive_properties_;
 
   // Maps of aura::WindowProperty<T> to their mus property names.
   // This supports types that can be serialized for Mojo, eg. T=std::string*.
   std::map<const WindowProperty<gfx::ImageSkia*>*, const char*>
       image_properties_;
   std::map<const WindowProperty<gfx::Rect*>*, const char*> rect_properties_;
+  std::map<const WindowProperty<gfx::Size*>*, const char*> size_properties_;
   std::map<const WindowProperty<std::string*>*, const char*> string_properties_;
   std::map<const WindowProperty<base::string16*>*, const char*>
       string16_properties_;
 
   DISALLOW_COPY_AND_ASSIGN(PropertyConverter);
 };
 
 }  // namespace aura
 
 #endif  // UI_AURA_MUS_PROPERTY_CONVERTER_H_