Merge to M47: Add a missing setjmp() to CCodec_JpegDecoder::v_GetNextLine().

If jpeg_read_scanlines() ends up calling the error callback, we longjmp
into some undefined state.

BUG=558840
TBR=thestig@chromium.org

Original Review URL: https://codereview.chromium.org/1463563003 .

(cherry picked from commit 06e33aec03f13c76d9eff5c09cb03e142b0c5ef1)

Review URL: https://codereview.chromium.org/1471913005 .