Default ctor of FontList initializes with IDS_UI_FONT_FAMILY_CROS.

This CL makes the default constructor of gfx::FontList initialize its font list from the default font description, set by gfx::FontList::SetDefaultFontDescription().

This CL is a preparation of http://crrev.com/32153002 , etc.

BUG=265485
TEST=none

Review URL: https://codereview.chromium.org/61933002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@236187 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 236187
[rAC, OSX] One NSTextView to bind them all.

All text is now rendered via a single NSTextView. Also, this CL changes
linespacing to 1.5x, which addresses UX feedback.

R=rsesek@chromium.org
BUG=277125, 315967, 315968

Review URL: https://codereview.chromium.org/68103003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@236188 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 236188