Add PDF plugin tests for onload() and reload().
Add PDF plugin tests for onload() and reload().

BUG=none
TEST=included
Review URL: http://codereview.chromium.org/6463004

git-svn-id: http://src.chromium.org/svn/trunk/src@74204 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: d38c3a4236db4e524c0b417799ceb7a20f68dd80
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