GitLab

The BookmarkEntity class always represents a Bookmark, so there's no
reason to have a ModelType param as part of its constructor.

BUG=NONE

Review URL: https://codereview.chromium.org/319823002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@276814 0039d316-1c4b-4281-b951-d872f2087c98