This CL refactors the Manage Passwords Bubble Code which previously depended on TabSpecificContentSettings to directly interact with ManagePasswordsController.

BUG=261628

Review URL: https://codereview.chromium.org/87853004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@238400 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 238400
Avoid DCHECK failures from get_characterExtents and get_unclippedSubstrings

BUG=324260

Review URL: https://codereview.chromium.org/98913002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@238401 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 238401