Update PrerenderBrowserTests to work with new
PrerenderContents.

Also update PrerenderContents to pass plugin
and HTML5 prerender tests.

BUG=81229
TEST=PrerenderBrowserTests (Once the new code is enabled)

Review URL: http://codereview.chromium.org/6905169

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@83841 0039d316-1c4b-4281-b951-d872f2087c98
std::string CreateClientRedirect(const std::string& dest_url) {
  const char* const kClientRedirectBase = "client-redirect?";
  return kClientRedirectBase + dest_url;
}

std::string CreateClientRedirect(const std::string& dest_url) {
  const char* const kClientRedirectBase = "client-redirect?";
  return kClientRedirectBase + dest_url;
}
