Revert r154574 and r154410 for slowing down remote debugging protocol.

BUG=262092
R=abarth@chromium.org

Review URL: https://codereview.chromium.org/19715006

git-svn-id: svn://svn.chromium.org/blink/trunk@154736 bbb929c8-8fbe-4397-9dbb-9b2b20218538