Chrome Version: 68.0.3440.87
Chrome OS Version: 10718.71.2
Chrome OS Platform: HP BLAZE
Network info: Open network

Steps To Reproduce:
(1) Execute chrome.documentScan.scan(scanProperties, function(results) { });


Expected Result:
(1) Results object to be populated.

Actual Result:
(1)  Result object is null.  Last error has generic "No scanners are available".  

How frequently does this problem reproduce? Always

What is the impact to the user, and is there a workaround? If so, what is
it?  I am going to try to manually install missing library lorgnette (see log below), for a work around, from ChromeOS git repository, until OS update is fixed.

Please provide any additional information below. Attach a screen shot or
log if possible. 

1.  Chrome User Log makes it look like recent update might have removed library that is needed by Chrome API documentScan.  "[918:918:0813/085047.428776:ERROR:object_proxy.cc(616)] Failed to call method: org.chromium.lorgnette.Manager.ListScanners: object_path= /org/chromium/lorgnette/Manager: org.freedesktop.DBus.Error.ServiceUnknown: The name org.chromium.lorgnette was not provided by any .service files" 

2.  This error appears every time I invoke chrome.documentScan.scan api.

3.  Code I am testing is from previously functioning application (not modified) "BVSD Student Document Scan".