NOP refactor to make various layout tests use setTimeout 1

This patch is a NOP because SetTimeout is clamped to 1ms under the hood.
But according to the spec it's not supposed to be.  The motivation behind
this patch is fixing the tests that become flaky with

https://codereview.chromium.org/467153003/

It's possible that not all setTimeout 0 -> 1s in the inspector tests
are strictly necessary, as I've gone and changed them all in the
affected files.

BUG=402694

Review URL: https://codereview.chromium.org/644093003

git-svn-id: svn://svn.chromium.org/blink/trunk@184095 bbb929c8-8fbe-4397-9dbb-9b2b20218538