Revert 226981 "[rAC, OSX] Make sure title shows."

I suspect this broke AutofillDialogControllerTest.* on Mac debug (http://build.chromium.org/p/chromium.mac/builders/Mac%2010.6%20Tests%20%28dbg%29%281%29/builds/42625/steps/browser_tests/logs/stdio)

> [rAC, OSX] Make sure title shows.
> 
> The dialog got a non-constant title with the introduction of
> ShouldShowSpinner(). This change ensures that a changed title is
> updating the dialog.
> 
> BUG=277320
> 
> Review URL: https://codereview.chromium.org/25968002

TBR=groby@chromium.org

Review URL: https://codereview.chromium.org/25997002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@226983 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 226983