Do not use invalidated std::map::iterators in PDF_ReplaceAbbr().
Do not use invalidated std::map::iterators in PDF_ReplaceAbbr().

Avoid invalidating iterators by deferring the std::map operations.

Also remove unused PDF_ReplaceFull().

BUG=577030
R=ochang@chromium.org

Review URL: https://codereview.chromium.org/1581963004 .

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