Clean-up: Replaces gfx::Font with gfx::FontList in c/b/chromeos.

As part of effort to support multiple fonts, this CL changes methods which are now taking gfx::Font so they will take gfx::FontList instead.

See https://docs.google.com/a/chromium.org/document/d/1D_25fp9B8b9aZJORfAjDIFq61NWvUquZ5xmKH-VcC4k/view

BUG=265485
TEST=Run unit_tests, ui_unittests, views_unittests

Review URL: https://codereview.chromium.org/106383006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@242591 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 242591