function DummyOView(map) {
    // Bind this to the map to access MapCanvasProjection
    this.setMap(map);
}

// Extend OverlayView to access MapCanvasProjection.
// Finally projection is only available after draw has been called.
DummyOView.prototype = new google.maps.OverlayView();
DummyOView.prototype.draw = function() {};