Question

In chrome, if I go to chrome://flags/ and make a change on the flags page ( enable/disabe features ), a button appears at the bottom of the page which when clicked restarts chrome and re-opens the pages that were opened.
Does anyone know what javascript code allows that to happen ?

This is the html where the button appears

<div class="needs-restart" jsdisplay="needsRestart">
        <div i18n-content="flagsRestartNotice">NEEDS_RESTART</div>
        <button class="experiment-restart-button"
                type="button"
                i18n-content="flagsRestartButton">RESTART</button>
</div>

Thanks

Answer 1

A restartBrowser() function is called from the click of that button.

From flags.js:

/**
 * Asks the C++ FlagsDOMHandler to restart the browser (restoring tabs).
 */
function restartBrowser() {
  chrome.send('restartBrowser');
}

Like the comment implies, it hooks into the C++ code behind Chrome, which will attempt a restart.