Add flag for read-only permissions in the Android page info popup
This adds a flag, --enable-read-only-website-settings-popup, which
replaces the dropdown boxes for allowing and blocking permissions within
the popup with a read-only display of current permissions. A 'Manage'
button opens the site settings so that the permissions can be modified.
This also fixes a small issue where localstorage would not always
display correctly in site settings due to including a trailing slash in
origin strings.
BUG=444747,430345,481427
Review URL: https://codereview.chromium.org/
1163503002
Cr-Commit-Position: refs/heads/master@{#332524}