GitLab

dialog UI design paradigm [Mac/Views]:

- Add a title ("You're now signed in to Chromium!")
- Modify "OK" button to say "OK, got it!" instead
- Adjust margins and gaps according to spec.

XIB changes:
* Added a new NSTextField for the “You’re now signed in to Chromium” title.
* Made the entire bubble taller (167 height) and wider (350 width) to accommodate new UI spec and to make room for the title text field.
* Repositioned the Advanced link and the OK button in order to have 10 view units margin from the bottom and left/right edges (also for new UI spec).

Screenshots:
* Mac: http://i.imgur.com/qKWKwR4.png
* Views: http://i.imgur.com/6fYmi42.png

BUG=322593
R=thakis@chromium.org

Review URL: https://codereview.chromium.org/107673002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@243744 0039d316-1c4b-4281-b951-d872f2087c98