Optimize code structure for input module.

Assets/Cryville/Common/Unity/Input/UnityTouchHandler.cs

@@ -12,18 +12,18 @@ namespace Cryville.Common.Unity.Input {
 			}
 		}
 
-		protected override void ActivateImpl() {
+		protected override void Activate() {
 			receiver = new GameObject("__touchrecv__");
 			receiver.AddComponent<UnityPointerReceiver>().SetHandler(this);
 		}
 
-		protected override void DeactivateImpl() {
+		protected override void Deactivate() {
 			if (receiver) GameObject.Destroy(receiver);
 		}
 
 		public override void Dispose(bool disposing) {
 			if (disposing) {
-				DeactivateImpl();
+				Deactivate();
 			}
 		}