Fix android NTP's scroll to top of page logic.

Setting or reading document.body.scroll{Left,Top} is deprecated in favor of
document.documentElement.scroll{Left,Top} in standards mode.

R=tedchoc@chromium.org
BUG=305742
TEST=on #hash change, android scrolls to top

Review URL: https://codereview.chromium.org/26865003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@227958 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 227958