PDF Viewer uses extension URL
PDF Viewer uses extension URL

Using "send this page" from a PDF in the built in PDF viewer results in
the body of the message containing the URL of the PDF Viewer extension
and not the source of the PDF.

Using info.srcURL when info.pageURL starts with "chrome-extension://"
fixes. Hopefully this is a generalized fix that works for all extensions
managed pages and not just the PDF Viewer

stadler/SendPage,stadler/SendPage