Add InputDeviceInfo to externs.
@@ -1474,6 +1474,17 @@ MediaDeviceInfo.prototype.label;
/** @const {string} */
MediaDeviceInfo.prototype.groupId;
+/**
+ * @interface
+ * @extends {MediaDeviceInfo}
+ * @see https://www.w3.org/TR/mediacapture-streams/#input-specific-device-info
+ */
+function InputDeviceInfo() {
+}
+
+/** @return {!MediaTrackCapabilities} */
+InputDeviceInfo.prototype.getCapabilities = function() {};
+
/**
* @interface
* @extends {EventTarget}
