refactor duplication (shouldSkip and skip_name) into a utility function

R=caryclark@google.com, reed@google.com

Committed: https://code.google.com/p/skia/source/detail?r=10280

Review URL: https://codereview.chromium.org/19807005

git-svn-id: http://skia.googlecode.com/svn/trunk@10317 2bbb7eff-a529-9590-31e7-b0007b416f81
6 files changed