Web toolbar icon is missing

Google recently released an update for Chrome which moved the Read&Write for Google Chrome web toolbar icon from the Chrome Omnibox

Read&Write for Google Chrome extension icon

 If the web toolbar icon is missing, it may have been hidden.

Click on the Chrome Settings button and you’ll see any icons that have been hidden at the top of the menu list

Chrome Settings button 

Right click on the Read&Write for Google Chrome icon and choose Show in toolbar

Read&Write for Google Chrome extension icon

That will restore the icon back to the Chrome toolbar

 Read&Write for Google Chrome extension icon

You can then click and drag the icon to move it anywhere in the extensions area