Draw Mac omnibox border using bitmaps (binary files)

Binary files from crrev.com/24292002

BUG=231005, 172742

Review URL: https://codereview.chromium.org/24335006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@224730 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 224730