Modify renderwidget unittest to make purify happy - Some posted task was not being processed. - It needed a mock of RenderProcess.
Modify renderwidget unittest to make purify happy
- Some posted task was not being processed.
- It needed a mock of RenderProcess.

Review URL: http://codereview.chromium.org/5660

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@2988 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