Allow browser to handle all WebUI navigations.

BUG=113496
TEST="Google Dashboard" link in Sync settings loads in new process.


Review URL: http://codereview.chromium.org/9663045

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@126949 0039d316-1c4b-4281-b951-d872f2087c98
void MockRenderThread::RemoveObserver(
    content::RenderProcessObserver* observer) {
}

void MockRenderThread::RemoveObserver(
    content::RenderProcessObserver* observer) {
}
