Infobar Windows Media Player plug-in by default.

BUG=51464
Review URL: http://codereview.chromium.org/7080048

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@87500 0039d316-1c4b-4281-b951-d872f2087c98
PluginInstallerInfoBarDelegate* PluginObserver::GetPluginInstaller() {
  if (plugin_installer_ == NULL)
    plugin_installer_.reset(new PluginInstallerInfoBarDelegate(tab_contents()));
  return plugin_installer_->AsPluginInstallerInfoBarDelegate();
}

PluginInstallerInfoBarDelegate* PluginObserver::GetPluginInstaller() {
  if (plugin_installer_ == NULL)
    plugin_installer_.reset(new PluginInstallerInfoBarDelegate(tab_contents()));
  return plugin_installer_->AsPluginInstallerInfoBarDelegate();
}
