Removing unneeded preventDefault calls

src/ol/interaction/altdragrotate.js

@@ -52,7 +52,6 @@ ol.interaction.AltDragRotate.prototype.handleDragStart =
         size.height / 2 - browserEvent.offsetY,
         browserEvent.offsetX - size.width / 2);
     this.startRotation_ = (map.getRotation() || 0) + theta;
-    browserEvent.preventDefault();
     return true;
   } else {
     return false;

src/ol/interaction/dragpan.js

@@ -40,7 +40,6 @@ ol.interaction.DragPan.prototype.handleDrag = function(mapBrowserEvent) {
 ol.interaction.DragPan.prototype.handleDragStart = function(mapBrowserEvent) {
   var browserEvent = mapBrowserEvent.browserEvent;
   if (!browserEvent.shiftKey) {
-    browserEvent.preventDefault();
     return true;
   } else {
     return false;

src/ol/interaction/shiftdragrotateandzoom.js

@@ -67,7 +67,6 @@ ol.interaction.ShiftDragRotateAndZoom.prototype.handleDragStart =
     var theta = Math.atan2(delta.y, delta.x);
     this.startRotation_ = (map.getRotation() || 0) + theta;
     this.startRatio_ = resolution / delta.magnitude();
-    browserEvent.preventDefault();
     return true;
   } else {
     return false;

src/ol/interaction/shiftdragzoom.js

@@ -68,7 +68,6 @@ ol.interaction.ShiftDragZoom.prototype.handleDragStart =
   if (browserEvent.isMouseActionButton() && browserEvent.shiftKey) {
     this.dragBox_ =
         new ol.control.DragBox(mapBrowserEvent.map, this.startCoordinate);
-    browserEvent.preventDefault();
     return true;
   } else {
     return false;

src/ol/renderer/map.js

@@ -92,12 +92,6 @@ ol.renderer.Map = function(container, map) {
         this.handleSizeChanged, false, this)
   ];
 
-  var viewport = map.getViewport();
-  goog.events.listen(viewport, goog.events.EventType.MOUSEDOWN,
-      goog.events.Event.preventDefault);
-  goog.events.listen(viewport, goog.events.EventType.TOUCHSTART,
-      goog.events.Event.preventDefault);
-
 };
 goog.inherits(ol.renderer.Map, goog.Disposable);