Google chart web component timeline hover patch

google-chart-styles.html

<dom-module id="google-chart-styles">
  <template>
    <style>
      :host .google-visualization-tooltip-action:hover {
        background-color: #eeeeee;
      }

      :host .google-visualization-tooltip {
        border:solid 1px #bdbdbd;
        border-radius: 2px;
        background-color: white;
        position: absolute;
        box-shadow: 0px 2px 2px 0px rgba(204, 204, 204, 0.6);
        font-size: 12px;
        padding: 0px;
        -moz-box-shadow: 0px 2px 2px 0px rgba(204, 204, 204, 0.6);
        -webkit-box-shadow: 0px 2px 2px 0px rgba(204, 204, 204, 0.6);
        z-index: 10000;
      }
      :host .google-visualization-tooltip-action-list {
        list-style-type: none;
        margin: 0;
        padding: 0.5em 0em 0.5em 0em;
        cursor: hand;
      }
      :host .google-visualization-tooltip-action {
        margin: 0;
        cursor: pointer;
        padding: 0.5em 2em 0.5em 1em;
      }
      :host .google-visualization-tooltip-action:hover {
        background-color: #eeeeee;
      }
      :host .google-visualization-tooltip-item-list {
        list-style-type: none;
        margin: 1em 0 1em 0;
        padding: 0em;
      }
      :host .google-visualization-tooltip-item {
        margin: 0.65em 0em 0.65em 0em;
        padding: 0em 2em 0em 1em;
      }
      :host .google-visualization-tooltip-item-list
      :host .google-visualization-tooltip-item:first-child {
        margin: 1em 0em 1em 0em;
      }
      :host .google-visualization-tooltip-separator {
        margin: 0;
        padding: 0;
        height: 1px;
        background-color: #dddddd;
      }
      :host .google-visualization-tooltip-square {
        display: inline-block;
        /* IE does not support inline-block fall back to float left */
        float: left\9;
        clear: none;
        width: 0.5em;
        height: 0.5em;
        margin: 0.16em 0.7em 0em 0em;
        border-bottom: solid 0.1em white;
      }
  
    </style>
  </template>
</dom-module>