Update WebVRManager.d.ts

src/renderers/webvr/WebVRManager.d.ts

@@ -1,6 +1,7 @@
 import { Object3D } from '../../core/Object3D';
 import { PerspectiveCamera } from '../../cameras/PerspectiveCamera';
 import { ArrayCamera } from '../../cameras/ArrayCamera';
+import { Matrix4 } from '../../math/Matrix4';
 
 export interface WebVRManager {
 	enabled: boolean;
@@ -10,4 +11,5 @@ export interface WebVRManager {
 	getCamera( camera: PerspectiveCamera ): PerspectiveCamera | ArrayCamera;
 	submitFrame(): void;
 	dispose(): void;
+	getStandingMatrix(): Matrix4;
 }