A bug (8132682) in "Download as PDF" from Google Docs makes table of
contents links point back to the original document. This causes
problems with external customers.
This change uses the following work around: print the document, and
select "Save as PDF" as the printer.
This only removes the links. It does not fix them. When bug 8132682
is fixed we can re-download the documents with proper links.
bug: 12585419
Change-Id: I4e4b0ff8d083192fd2db6a569d1c3f84c8ec4fa9