Merge to XFA: Make CFX_FontMgr member variables private. (try 2)

R=tsepez@chromium.org

Review URL: https://codereview.chromium.org/1412733011 .

(cherry picked from commit 5a5b6fb3759daf1201ffc9702f626f4b243922d0)

Review URL: https://codereview.chromium.org/1414463006 .
6 files changed