Hook up alt-d on linux.
Hook up alt-d on linux.

Also clean up some accelerators.

BUG=10803

Review URL: http://codereview.chromium.org/90008

git-svn-id: http://src.chromium.org/svn/trunk/src@14123 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 8d1b4d06f785171549fa8b3334c110a901ea0207
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