Save to a PDF file should look like print preview.

When rendering a PDF file for print preview we take into account
the selected print options such as paper size, orientation, etc
without modifying the document. To print we send the doc in its
original form and the print options so the print service can apply
the necessary transforms in addition to the optional custom options
it supports. When saving to PDF we have to actually change the
document as we act as a print service.

bug:13545980

Change-Id: Icdcecf962bec6ff742cc6015df5af9d9086ce760