Added support for search filters in dashboard.

On local runs of run-webkit-tests a dashboard is generated. Developer can re-run the failed tests from this dashboard directly.
These search filters allow the developer to search among the failed tests in the dashboard.

BUG=418580

Review URL: https://codereview.chromium.org/635413003

git-svn-id: svn://svn.chromium.org/blink/trunk@183755 bbb929c8-8fbe-4397-9dbb-9b2b20218538