[Mac] Show the contextual menu for page actions on Ctrl+Click.
[Mac] Show the contextual menu for page actions on Ctrl+Click.

BUG=32072
TEST=Ctrl+Click on a page action opens the context menu. A real right-click still does the same.

Review URL: http://codereview.chromium.org/894004

git-svn-id: http://src.chromium.org/svn/trunk/src@41533 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 9c9d52ced51512712e1f76dd570d058afd04df55
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