diff --git a/src/ol/format/gpxformat.js b/src/ol/format/gpxformat.js
index 1c3f998a24..fabb0f6b72 100644
--- a/src/ol/format/gpxformat.js
+++ b/src/ol/format/gpxformat.js
@@ -3,7 +3,6 @@ goog.provide('ol.format.GPX');
 goog.require('goog.array');
 goog.require('goog.asserts');
 goog.require('goog.dom.NodeType');
-goog.require('goog.object');
 goog.require('ol.Feature');
 goog.require('ol.format.Feature');
 goog.require('ol.format.XMLFeature');
@@ -71,16 +70,14 @@ ol.format.GPX.appendCoordinate_ = function(flatCoordinates, node, values) {
   flatCoordinates.push(
       parseFloat(node.getAttribute('lon')),
       parseFloat(node.getAttribute('lat')));
-  if (goog.object.containsKey(values, 'ele')) {
-    flatCoordinates.push(
-        /** @type {number} */ (values['ele']));
+  if ('ele' in values) {
+    flatCoordinates.push(/** @type {number} */ (values['ele']));
     delete values['ele'];
   } else {
     flatCoordinates.push(0);
   }
-  if (goog.object.containsKey(values, 'time')) {
-    flatCoordinates.push(
-        /** @type {number} */ (values['time']));
+  if ('time' in values) {
+    flatCoordinates.push(/** @type {number} */ (values['time']));
     delete values['time'];
   } else {
     flatCoordinates.push(0);
diff --git a/src/ol/pointer/mousesource.js b/src/ol/pointer/mousesource.js
index 1e226c8ef9..131d4adbca 100644
--- a/src/ol/pointer/mousesource.js
+++ b/src/ol/pointer/mousesource.js
@@ -30,7 +30,6 @@
 
 goog.provide('ol.pointer.MouseSource');
 
-goog.require('goog.object');
 goog.require('ol.pointer.EventSource');
 
 
@@ -161,11 +160,9 @@ ol.pointer.MouseSource.prepareEvent = function(inEvent, dispatcher) {
  */
 ol.pointer.MouseSource.prototype.mousedown = function(inEvent) {
   if (!this.isEventSimulatedFromTouch_(inEvent)) {
-    var p = goog.object.containsKey(this.pointerMap,
-        ol.pointer.MouseSource.POINTER_ID.toString());
     // TODO(dfreedman) workaround for some elements not sending mouseup
     // http://crbug/149091
-    if (p) {
+    if (ol.pointer.MouseSource.POINTER_ID.toString() in this.pointerMap) {
       this.cancel(inEvent);
     }
     var e = ol.pointer.MouseSource.prepareEvent(inEvent, this.dispatcher);