InputCommon: Eliminate some duplicated button threshold logic.

Source/Core/InputCommon/ControllerEmu/Control/Control.h

@@ -7,7 +7,7 @@
 #include <memory>
 #include <string>
 
-class ControlReference;
+#include "InputCommon/ControlReference/ControlReference.h"
 
 namespace ControllerEmu
 {
@@ -22,6 +22,12 @@ class Control
 public:
   virtual ~Control();
 
+  template <typename T = ControlState>
+  T GetState()
+  {
+    return control_ref->GetState<T>();
+  }
+
   std::unique_ptr<ControlReference> const control_ref;
   const Translatability translate;
   const std::string name;
@@ -33,4 +39,5 @@ protected:
   Control(std::unique_ptr<ControlReference> ref, Translatability translate,
           const std::string& name);
 };
+
 }  // namespace ControllerEmu