Once you have installed the app go to chrome://flags and then search for the Bulk Password Check flag. Enable that, then restart the browser and you should see a new ‘check password’ option available within the passwords setting. Click this option to scan your saved passwords to see if any of these logins have been compromised.
You can also enable the new Safety Check feature that has been added to the latest version of Chrome Canary for Android.
As the name suggests, this is a toolkit which ensures Chrome is set up for safe browsing and protects a user from dangerous websites and malicious malware downloads. To activate it you will have to enable the Safety Check on Android flag and then restart your browser.
There should then be a Safety Check option in the Chrome Canary browser settings.