DevTools: Resource Timing: expand table in detailed view.

Screenshots:

Before / popover:
http://picpaste.com/before1.png

Before / details:
http://picpaste.com/before2.png

After / popover:
http://picpaste.com/after1.png

After / details:
http://picpaste.com/after2.png

BUG=403508

Review URL: https://codereview.chromium.org/471163005

git-svn-id: svn://svn.chromium.org/blink/trunk@183670 bbb929c8-8fbe-4397-9dbb-9b2b20218538