DevTools: NetworkPanel: fix search.

Problem:
 Nodes are not revealed and not highlighted.
 Search box constantly loose focus.

Solution:
 Do not focus dataGrid on node reveal.
 Avoid refresh of all nodes on node reveal.
 Fix parameter type passed to revealer.
 Match and highlight same element.
 Reval node before highlight.

Most probably regressed by:
https://codereview.chromium.org/391083003

BUG=

Review URL: https://codereview.chromium.org/470093002

git-svn-id: svn://svn.chromium.org/blink/trunk@180258 bbb929c8-8fbe-4397-9dbb-9b2b20218538