Merge "Add a security warning to PdfRenderer doc." into nyc-dev
am: e5bbff8

* commit 'e5bbff846e5dce0e583050deebb24670f1bc65ba':
  Add a security warning to PdfRenderer doc.

Change-Id: Ie8cb3c4941d7903bae98bb9cfd29f37709c3c6f8