Extension API: chrome.browserAction.onClicked

[jonathansampson]

https://developer.chrome.com/extensions/browserAction#event-onClicked

[jonathansampson]

Blocks #8327, #6366, #9828

[jonathansampson]

The following test fails:

1. Enable LastPass
2. Navigate to chrome-extension://hdokiejnpimakedhajhdlcegeplioahd/background.html
3. From the console, run Script A
4. Click the Browser Action Icon (LastPass icon)

Script A

chrome.browserAction.onClicked.addListener( e => console.log('Clicked!') )

Expectation

Clicking the browser action icon will cause Clicked! to be logged to the console.

Actual

Clicking the browser action icon appears to do nothing.

[jonathansampson]

This is, at the very least, minimally supported with addListener.