Merge to XFA: CFX_MapByteStringToPtr considered harmful (combo patch).

New manual edits: two unused members deleted, one adapted.
    fde_csscache.cpp
    fde_csscache.h
    fpdfxfa_doc.h
    fx_ge_fontmap.cpp

(cherry picked from commit 1d9dbd53b205b2b4d9e75a7eeb95e80837917ea3)
(cherry picked from commit cb4d0ea68308e3c51a6ba9551b393bb2f639afc4)
(cherry picked from commit 9cf44c2ed09a8b2ff243eb6dbb72a8cceae1b5ff)
(cherry picked from commit 2a2a6aa7f51352fc481e78f6ad9d41f2738bcc48)
(cherry picked from commit ce4ffb8183af3fa2bb5133f0f7370a88e064c516)
Original Review URL: https://codereview.chromium.org/1297723002 .

R=thestig@chromium.org

Review URL: https://codereview.chromium.org/1301793002 .
22 files changed