[Password Manager] Modified to support saving passwords on forms without user-name fields.
With current implementation forms lacking user-name fields are treated as invalid password forms and browser does not save passwords in such cases.
With this patch password manager saves passwords on forms without user-name fields as well.
BUG=406343
TBR=gcasto@chromium.org,vabr@chromium.org
Review URL: https://codereview.chromium.org/548953002
Cr-Commit-Position: refs/heads/master@{#296943}
7 files changed