Pipe cmd-z back to browser.
Pipe cmd-z back to browser.

Followup to http://codereview.chromium.org/355016

BUG=26735
TEST=Focus web, hit cmd-z. Should blink menu bar. Same for cmd-shift-z.

Review URL: http://codereview.chromium.org/371031

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@31291 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser