xfa_fm2jscontext method clean - pt II
xfa_fm2jscontext method clean - pt II

Cleanup ::Max, ::Floor, ::Count, ::Ceil, ::Avg and ::Abs. Remove unneeded
strings from reservesForDecode (saves 4k when building pdfium_test).

Review-Url: https://codereview.chromium.org/2024133002

DrAlexx/pdfium,DrAlexx/pdfium,DrAlexx/pdfium,DrAlexx/pdfium