Using "dom: 'shadow'" option in polymer invalidates the css styles

[javiercbk]

The polymer documentation states:

shadow. Local DOM is rendered using shadow DOM where supported (this will be the default in the future).

Setting the dom global variable to shadow breaks all the css styles and rules.
window.Polymer = {dom: 'shadow'};

[saeidzebardast]

Add ::shadow to nvd3-shared-styles.html selectors fix many issues but some issues such as background of tooltip box aren't fixed.

[saeidzebardast]

Fixed at v0.19.0.