Use irt from within chrome install

BUG=http://code.google.com/p/chromium/issues/detail?id=140091

Review URL: https://chromiumcodereview.appspot.com/10915292

git-svn-id: https://nativeclient-sdk.googlecode.com/svn/trunk/src@1413 050acbb0-2703-11df-ab0a-9f3f633ae91d
5 files changed