Get rid of lazy block.

We never ended up pushing this forward. If we do decide to take
another look at this, we'll do so on a branch anyways.

Review URL: https://chromiumcodereview.appspot.com/23072015

git-svn-id: svn://svn.chromium.org/blink/trunk@156126 bbb929c8-8fbe-4397-9dbb-9b2b20218538