Revert 241085 "[rAc] [OSX] Set tooltip bubble arrow's anchor poi..."

Suspect of breaking mac autofill tests on main waterfall.

> [rAc] [OSX] Set tooltip bubble arrow's anchor point based on the icon location.
> 
> The bubble should always be between the horizontal edges of the dialog.
> 
> BUG=325482
> TEST=(see bug)
> R=groby@chromium.org
> 
> Review URL: https://codereview.chromium.org/113763002

TBR=isherman@chromium.org

Review URL: https://codereview.chromium.org/116973002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@241092 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 241092