[DevTools] Moved filters from ConsoleView to ConsoleModel.

This would simplify filtering resource messages with console filters.

BUG=256594

Review URL: https://chromiumcodereview.appspot.com/21030007

git-svn-id: svn://svn.chromium.org/blink/trunk@155534 bbb929c8-8fbe-4397-9dbb-9b2b20218538