Pass the testing interface command line switch to Chrome when running the PPAPI UI tests.
Pass the testing interface command line switch to Chrome when running the PPAPI UI tests.

TEST=this is a test
BUG=none
Review URL: http://codereview.chromium.org/2736007

git-svn-id: http://src.chromium.org/svn/trunk/src@49589 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 54db83e23da56bb99d8a9bc7d517330bf85546c8
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