[PDF] Ensure that filling single line paths (with no area) does not draw anything.

Add a test to a gm to confirm the new behavior.

Fixes http://crbug.com/123072

Review URL: https://codereview.appspot.com/6137060

git-svn-id: http://skia.googlecode.com/svn/trunk@3884 2bbb7eff-a529-9590-31e7-b0007b416f81
5 files changed