GTK: Allow infobubbles to be programtically shrunk.
GTK: Allow infobubbles to be programtically shrunk.

This should only actually affect ExtensionPopups as other infobubbles never resize.

BUG=30294
TEST=chromed bird extension resizes after reverting http://trac.webkit.org/changeset/51492

Review URL: http://codereview.chromium.org/526003

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@35472 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