Merge to XFA: Cleanup CFX_UnicodeEncoding and remove IFX_FontEncoding.

Similarly, Clean up CFX_UnicodeEncodingEx and remove IFX_FontEncodingEx.

R=tsepez@chromium.org

Review URL: https://codereview.chromium.org/1296753003 .

(cherry picked from commit 52a48aadc19b2dee8abeb702269bb168eb6b6999)

Review URL: https://codereview.chromium.org/1297083002 .
9 files changed