Replace goog.isDefAndNotNull() with truthy checks

src/ol/interaction/draganddropinteraction.js

@@ -121,7 +121,7 @@ ol.interaction.DragAndDrop.prototype.handleResult_ = function(file, result) {
       for (j = 0, jj = readFeatures.length; j < jj; ++j) {
         var feature = readFeatures[j];
         var geometry = feature.getGeometry();
-        if (goog.isDefAndNotNull(geometry)) {
+        if (geometry) {
           geometry.applyTransform(transform);
         }
         features.push(feature);

src/ol/interaction/interaction.js

@@ -147,7 +147,7 @@ ol.interaction.Interaction.rotate =
  */
 ol.interaction.Interaction.rotateWithoutConstraints =
     function(map, view, rotation, opt_anchor, opt_duration) {
-  if (goog.isDefAndNotNull(rotation)) {
+  if (rotation !== undefined) {
     var currentRotation = view.getRotation();
     var currentCenter = view.getCenter();
     if (currentRotation !== undefined && currentCenter &&
@@ -218,7 +218,7 @@ ol.interaction.Interaction.zoomByDelta =
  */
 ol.interaction.Interaction.zoomWithoutConstraints =
     function(map, view, resolution, opt_anchor, opt_duration) {
-  if (goog.isDefAndNotNull(resolution)) {
+  if (resolution) {
     var currentResolution = view.getResolution();
     var currentCenter = view.getCenter();
     if (currentResolution !== undefined && currentCenter &&
@@ -237,7 +237,7 @@ ol.interaction.Interaction.zoomWithoutConstraints =
         }));
       }
     }
-    if (goog.isDefAndNotNull(opt_anchor)) {
+    if (opt_anchor) {
       var center = view.calculateCenterZoom(resolution, opt_anchor);
       view.setCenter(center);
     }