Added strings for PDF plugin.
Added strings for PDF plugin.

BUG=none
TEST=none


Review URL: http://codereview.chromium.org/3343012

git-svn-id: http://src.chromium.org/svn/trunk/src@58858 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: ab5ec6b58ac6bf9df44f4f825476fcce68aaa0e6
meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser