Move pixel/coordinate matrices into frame state, remove canRotate

src/ol/interaction/dragzoominteraction.js

@@ -70,12 +70,8 @@ ol.interaction.DragZoom.prototype.handleDragEnd =
       goog.asserts.assert(view instanceof ol.View2D);
       var mapSize = /** @type {ol.Size} */ (map.getSize());
       view.fitExtent(extent, mapSize);
-      if (map.canRotate()) {
-        // FIXME we don't set the rotation if the map doesn't
-        // support rotation, this will prevent any map using
-        // that view from rotating, which may not be desired
-        view.setRotation(0);
-      }
+      // FIXME we should preserve rotation
+      view.setRotation(0);
     });
   }
 };