Fix a BAD_OVERRIDE defect reported by Coverity.  Remove an unused version of the OnMessageReceived method.
Fix a BAD_OVERRIDE defect reported by Coverity.  Remove
an unused version of the OnMessageReceived method.

R=brettw
BUG=17104
TEST=none
Review URL: http://codereview.chromium.org/160242

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@21889 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