"Am I on the right thread?" DCHECKs for StatusBubbleMac.
"Am I on the right thread?" DCHECKs for StatusBubbleMac.

This doesn't fix bug 26979, but I want to get these DCHECKs in as I continue
to investigate that bug.

BUG=26979
TEST=don't hit these DCHECKs
Review URL: http://codereview.chromium.org/385043

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@31695 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