Remove empty directory.

git-svn-id: svn://svn.chromium.org/blink/trunk@166668 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Remove minimum layout delay

This CL removes the concept of a minium layout delay. Now that we use animation
frames to control the timing of layout, this concept doesn't make much sense.
It's possible we'll add back a feature like this in the future, but we'll need
to structure the code a bit differently.

R=ojan@chromium.org
BUG=341627

Review URL: https://codereview.chromium.org/156943004

git-svn-id: svn://svn.chromium.org/blink/trunk@166669 bbb929c8-8fbe-4397-9dbb-9b2b20218538