Pass load events from prerenders to launching elements.

The event is already on the webkit side, this patch plumbs it through. Note that this patch is downstream from https://codereview.chromium.org/11551003/ and so it can't land until after that one.

R=mmenke@chromium.org,jschuh@chromium.org
BUG=None


Review URL: https://chromiumcodereview.appspot.com/11571037

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@175011 0039d316-1c4b-4281-b951-d872f2087c98
15 files changed