Mac: Fix missing toolbar buttons focus ring on 10.8
Mac: Fix missing toolbar buttons focus ring on 10.8

Change toolbar buttons to be bordered to make the new style "automatic focus ring"
work on 10.8.
AppKit skipped the focus ring on these buttons because it's a button without a
border, image, or label.

Toolbar.xib changes: checked the "Bordered" checkboxes on all the toolbar buttons
(back, forward, reload, home, wrench).

BUG=527662

Review URL: https://codereview.chromium.org/1308993009

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#347760}

CapOM/ChromiumGStreamerBackend,CapOM/ChromiumGStreamerBackend,ltilve/ChromiumGStreamerBackend,CapOM/ChromiumGStreamerBackend,CapOM/ChromiumGStreamerBackend,ltilve/ChromiumGStreamerBackend,ltilve/ChromiumGStreamerBackend,ltilve/ChromiumGStreamerBackend,ltilve/ChromiumGStreamerBackend,ltilve/ChromiumGStreamerBackend,ltilve/ChromiumGStreamerBackend,CapOM/ChromiumGStreamerBackend,CapOM/ChromiumGStreamerBackend,ltilve/ChromiumGStreamerBackend,CapOM/ChromiumGStreamerBackend,CapOM/ChromiumGStreamerBackend,CapOM/ChromiumGStreamerBackend,ltilve/ChromiumGStreamerBackend