DevTools: Do not switch to other profile when revealing a node

When a node to reveal exists in the current profile show it right there
rather than switching to another profile.

Review URL: https://codereview.chromium.org/553063002

git-svn-id: svn://svn.chromium.org/blink/trunk@181708 bbb929c8-8fbe-4397-9dbb-9b2b20218538