diff --git a/externs/polymer-internal-shared-types.js b/externs/polymer-internal-shared-types.js
index 937ba617ed..fd954c1180 100644
--- a/externs/polymer-internal-shared-types.js
+++ b/externs/polymer-internal-shared-types.js
@@ -164,3 +164,51 @@ function AsyncInterface(){}
 AsyncInterface.prototype.run;
 /** @type {function(number): void} */
 AsyncInterface.prototype.cancel;
+
+/** @record */
+let GestureInfo = function(){};
+/** @type {string|undefined} */
+GestureInfo.prototype.state;
+/** @type {boolean|undefined} */
+GestureInfo.prototype.started;
+/** @type {!Array<?>|undefined} */
+GestureInfo.prototype.moves;
+/** @type {number|undefined} */
+GestureInfo.prototype.x;
+/** @type {number|undefined} */
+GestureInfo.prototype.y;
+/** @type {boolean|undefined} */
+GestureInfo.prototype.prevent;
+/** @type {function(?): void|undefined} */
+GestureInfo.prototype.addMove;
+/** @type {null|undefined} */
+GestureInfo.prototype.movefn;
+/** @type {null|undefined} */
+GestureInfo.prototype.upFn;
+
+/** @record */
+let GestureRecognizer = function(){};
+/** @type {string} */
+GestureRecognizer.prototype.name;
+/** @type {!Array<string>} */
+GestureRecognizer.prototype.deps;
+/** @type {function(): void} */
+GestureRecognizer.prototype.reset;
+/** @type {function(MouseEvent): void | undefined} */
+GestureRecognizer.prototype.mousedown;
+/** @type {(function(MouseEvent): void | undefined)} */
+GestureRecognizer.prototype.mousemove;
+/** @type {(function(MouseEvent): void | undefined)} */
+GestureRecognizer.prototype.mouseup;
+/** @type {(function(TouchEvent): void | undefined)} */
+GestureRecognizer.prototype.touchstart;
+/** @type {(function(TouchEvent): void | undefined)} */
+GestureRecognizer.prototype.touchmove;
+/** @type {(function(TouchEvent): void | undefined)} */
+GestureRecognizer.prototype.touchend;
+/** @type {(function(MouseEvent): void | undefined)} */
+GestureRecognizer.prototype.click;
+/** @type {!GestureInfo} */
+GestureRecognizer.prototype.info;
+/** @type {!Array<string>} */
+GestureRecognizer.prototype.emits;
diff --git a/lib/utils/gestures.js b/lib/utils/gestures.js
index 9b0548bf4d..c2a93270a1 100644
--- a/lib/utils/gestures.js
+++ b/lib/utils/gestures.js
@@ -92,50 +92,6 @@ function PASSIVE_TOUCH(eventName) {
 // Check for touch-only devices
 let IS_TOUCH_ONLY = navigator.userAgent.match(/iP(?:[oa]d|hone)|Android/);
 
-/** @record */
-const GestureInfo = function(){}; // eslint-disable-line no-unused-vars
-/** @type {string|undefined} */
-GestureInfo.prototype.state;
-/** @type {boolean|undefined} */
-GestureInfo.prototype.started;
-/** @type {!Array<?>|undefined} */
-GestureInfo.prototype.moves;
-/** @type {number|undefined} */
-GestureInfo.prototype.x;
-/** @type {number|undefined} */
-GestureInfo.prototype.y;
-/** @type {boolean|undefined} */
-GestureInfo.prototype.prevent;
-/** @type {function(?): void|undefined} */
-GestureInfo.prototype.addMove;
-/** @type {null|undefined} */
-GestureInfo.prototype.movefn;
-/** @type {null|undefined} */
-GestureInfo.prototype.upFn;
-
-/** @record */
-const GestureRecognizer = function(){}; // eslint-disable-line no-unused-vars
-/** @type {function(): void} */
-GestureRecognizer.prototype.reset;
-/** @type {function(MouseEvent): void | undefined} */
-GestureRecognizer.prototype.mousedown;
-/** @type {(function(MouseEvent): void | undefined)} */
-GestureRecognizer.prototype.mousemove;
-/** @type {(function(MouseEvent): void | undefined)} */
-GestureRecognizer.prototype.mouseup;
-/** @type {(function(TouchEvent): void | undefined)} */
-GestureRecognizer.prototype.touchstart;
-/** @type {(function(TouchEvent): void | undefined)} */
-GestureRecognizer.prototype.touchmove;
-/** @type {(function(TouchEvent): void | undefined)} */
-GestureRecognizer.prototype.touchend;
-/** @type {(function(MouseEvent): void | undefined)} */
-GestureRecognizer.prototype.click;
-/** @type {!GestureInfo} */
-GestureRecognizer.prototype.info;
-/** @type {!Array<string>} */
-GestureRecognizer.prototype.emits;
-
 // keep track of any labels hit by the mouseCanceller
 /** @type {!Array<!HTMLLabelElement>} */
 const clickedLabels = [];
@@ -378,7 +334,10 @@ function untrackDocument(stateObj) {
 // Use passive event listeners, if supported, to not affect scrolling performance
 document.addEventListener('touchend', ignoreMouse, SUPPORTS_PASSIVE ? {passive: true} : false);
 
+/** @type {!Object<string, !GestureRecognizer>} */
 export const gestures = {};
+
+/** @type {!Array<!GestureRecognizer>} */
 export const recognizers = [];
 
 /**