External contribution from developer0420@gmail.com. Pressing enter in the bookmark bubble when focus is on the edit button should start editing.
External contribution from developer0420@gmail.com. Pressing enter in
the bookmark bubble when focus is on the edit button should start editing.

BUG=2863
TEST=Bring up the bookmark bubble, move focus to the edit button and press
  enter. Make sure the editor comes up.

Review URL: http://codereview.chromium.org/6594

git-svn-id: http://src.chromium.org/svn/trunk/src@3036 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: c7d4791481b2c12bbbfafa0da8e8b7e3c6626eb5
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