FEditorViewportTypeDefinition ( const [FFactoryFunctionType](API\Editor\UnrealEd\FEditorViewportTypeDefinition\FFactoryFunctionType) & InFactoryFunction, const [TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [FUICommandInfo](API\Runtime\Slate\Framework\Commands\FUICommandInfo) > & InActivationCommand )