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
int ExtensionTabUtil::GetWindowIdOfTab(const WebContents* web_contents) {
  NOTIMPLEMENTED();
  return -1;
}

int ExtensionTabUtil::GetWindowIdOfTab(const WebContents* web_contents) {
  NOTIMPLEMENTED();
  return -1;
}
