
Enter chrome://settings-frame/passwords the old interface will appear with the import and export button.
After you've activated chrome://flags/#password-import-export. 


https://productforums.google.com/forum/#!topic/chrome/99KZmH2DRrA;context-place=topicsearchin/chrome/category$3Areport-a-problem-and-get-troubleshooting-help%7Csort:relevance%7Cspell:false

particular ref
Fanica Colbea said:
Enter chrome://settings-frame/passwords the old interface will appear with the import and export button.
After you've activated chrome://flags/#password-import-export