Remove the black line from the bottom of the status bubble.
Remove the black line from the bottom of the status bubble.

TEST=Make the Chrome window on top of a white window with a link at the very
     bottom of the window. Hover over the link so that the status bubble moves
     outside the chrome window and over the background. The bottom line should
     be consistent and not have the part under the text be black.
Review URL: http://codereview.chromium.org/53068

git-svn-id: http://src.chromium.org/svn/trunk/src@12491 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 92688d076b20db9c56fd900fa69e08f055d6317c
meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser