Fix DCHECK when handling NOTIFY_USER_SCRIPTS_LOADED by not broadcasting the message if we don't have any scripts.
Fix DCHECK when handling NOTIFY_USER_SCRIPTS_LOADED by not broadcasting the
message if we don't have any scripts.

Review URL: http://codereview.chromium.org/19441

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@8851 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