Use Path Ops to generate PDF clips

R=vandebo@chromium.org, edisonn@google.com, caryclark@google.com

Author: richardlin@chromium.org

Review URL: https://chromiumcodereview.appspot.com/21161003

git-svn-id: http://skia.googlecode.com/svn/trunk@10633 2bbb7eff-a529-9590-31e7-b0007b416f81
4 files changed