[PDF] Fix bugs preventing gm from running with PDF support.

Fix copy-paste ref counting bug.
Change NOT_IMPLEMENTED macro to only assert in debug mode.

Review URL: http://codereview.appspot.com/4080048

git-svn-id: http://skia.googlecode.com/svn/trunk@748 2bbb7eff-a529-9590-31e7-b0007b416f81
2 files changed