Add a script for running pdfviewer and comparing to existing results.

For quick, local checking to see how changes to pdfviewer have changed
PDF files.

Scripts were originally written by edisonn, and updated here for checkin.

R=epoger@google.com

Review URL: https://codereview.chromium.org/62103008

git-svn-id: http://skia.googlecode.com/svn/trunk@12241 2bbb7eff-a529-9590-31e7-b0007b416f81
2 files changed