That is probably because your Google Chrome auto-update failed to update automatically. In my case, it happens to the Google Chrome update for Version 57.0.2987 to Version 58.0.3029.96 for Windows and Mac OS on 2017-04-19.
Here's a tutorial on how to manually trigger the Google Chrome auto-update:
Open Chrome browser and click the vertical 3-dots <span class=""><i><b>settings button.</b></i></span>
At the settings menu, mouseover to <b><i>[Help]</i></b> and Click <span class=""><i><b>[About Google Chrome].</b></i></span>
Your Google Chrome version is shown here. The update will start automatically.
Last step is to <b><i>relaunch</i> </b>your Google Chrome browser.
Well done! Your Google Chrome browser is up to date.
For iOS and Android version, you may refer to the official Google Help site.
And here's the Google Chrome version history if you are interested.