Config: Add Get/Set on Layer

For convenience, when getting/setting from ConfigInfos.

Source/Core/Common/Config/Config.h

@@ -66,9 +66,7 @@ LayerType GetActiveLayerForConfig(const ConfigLocation&);
 template <typename T>
 T Get(LayerType layer, const ConfigInfo<T>& info)
 {
-  return GetLayer(layer)
+  return GetLayer(layer)->Get(info);
-      ->GetOrCreateSection(info.location.system, info.location.section)
-      ->template Get<T>(info.location.key, info.default_value);
 }
 
 template <typename T>
@@ -92,9 +90,7 @@ LayerType GetActiveLayerForConfig(const ConfigInfo<T>& info)
 template <typename T>
 void Set(LayerType layer, const ConfigInfo<T>& info, const T& value)
 {
-  GetLayer(layer)
+  GetLayer(layer)->Set(info, value);
-      ->GetOrCreateSection(info.location.system, info.location.section)
-      ->Set(info.location.key, value);
   InvokeConfigChangedCallbacks();
 }
 

Source/Core/Common/Config/Layer.h

@@ -14,6 +14,9 @@
 
 namespace Config
 {
+template <typename T>
+struct ConfigInfo;
+
 using LayerMap = std::map<System, std::vector<std::unique_ptr<Section>>>;
 
 class ConfigLayerLoader
@@ -52,6 +55,20 @@ public:
   virtual Section* GetSection(System system, const std::string& section_name);
   virtual Section* GetOrCreateSection(System system, const std::string& section_name);
 
+  template <typename T>
+  T Get(const ConfigInfo<T>& config_info)
+  {
+    return GetOrCreateSection(config_info.location.system, config_info.location.section)
+        ->template Get<T>(config_info.location.key, config_info.default_value);
+  }
+
+  template <typename T>
+  void Set(const ConfigInfo<T>& config_info, const T& value)
+  {
+    GetOrCreateSection(config_info.location.system, config_info.location.section)
+        ->Set(config_info.location.key, value);
+  }
+
   // Explicit load and save of layers
   void Load();
   void Save();