Adding parameter for PM color validation

In order for the arithmetic mode to be able to not validate its PM color between subsequent arithmetic image filters, I added an option to be able to output an invalid PM color if needed.

BUG=

Review URL: https://codereview.chromium.org/215223002

git-svn-id: svn://svn.chromium.org/blink/trunk@170899 bbb929c8-8fbe-4397-9dbb-9b2b20218538