Don't try to show info bubble for prerender icon in GTK.
Don't try to show info bubble for prerender icon in GTK.

BUG=73065
TEST=Click on prerender icon on GTK build, nothing happens.

Review URL: http://codereview.chromium.org/6566007

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@75778 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