Do not pass URLs in onUpdated events to extensions unless they have the
"tabs" permission.

BUG=168442


Review URL: https://chromiumcodereview.appspot.com/11824004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@176406 0039d316-1c4b-4281-b951-d872f2087c98
void BrowserEventRouter::TabChangedAt(WebContents* contents,
                                      int index,
                                      TabChangeType change_type) {
  TabUpdated(contents, false);
}

void BrowserEventRouter::TabChangedAt(WebContents* contents,
                                      int index,
                                      TabChangeType change_type) {
  TabUpdated(contents, false);
}
