Merge to XFA: Get rid of gotos in CPDF_SyntaxParser and FlateUncompress(). TBR=tsepez@chromium.org Review URL: https://codereview.chromium.org/1360103002 . (cherry picked from commit b8a074711108baf04017d86207e08c19ff327d8e) Review URL: https://codereview.chromium.org/1384123002 .