Remove our only use of dynamic_cast, which is not needed.
Remove our only use of dynamic_cast, which is not needed.

We don't want to ever use RTTI.  This was casting a WebContents to a
TabContents, which is a simple and safe upcase, since WebContents derives from
TabContents.  It should have just been a static_cast.

Review URL: http://codereview.chromium.org/62147


git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@13350 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