Restrict the Chromoting client plugin to use by extensions & apps.

BUG=160456


Review URL: https://chromiumcodereview.appspot.com/11365276

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@168289 0039d316-1c4b-4281-b951-d872f2087c98
void ChromotingInstance::InjectKeyEvent(const protocol::KeyEvent& event) {
  if (IsConnected())
    input_tracker_.InjectKeyEvent(event);
}

void ChromotingInstance::InjectKeyEvent(const protocol::KeyEvent& event) {
  if (IsConnected())
    input_tracker_.InjectKeyEvent(event);
}
