Revert "Another polyfill type need in DDC SDK."
Revert "Another polyfill type need in DDC SDK."

This reverts commit f16977f1946ef16eb712707768ed8c225801f690.

Change-Id: Ifa0d31c14a1ba0cdb3ababa95e883b46e10c9db4
Reviewed-on: https://dart-review.googlesource.com/12302
Reviewed-by: Terry Lucas <fb7922595ad9c210c0f3ce773f00cc8b9d8e21f3@google.com>

dart-lang/sdk,dart-archive/dart-sdk,dart-archive/dart-sdk,dart-archive/dart-sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-archive/dart-sdk,dart-lang/sdk,dartino/dart-sdk,dartino/dart-sdk,dartino/dart-sdk,dart-archive/dart-sdk,dart-archive/dart-sdk,dartino/dart-sdk,dartino/dart-sdk,dart-archive/dart-sdk,dartino/dart-sdk,dartino/dart-sdk,dartino/dart-sdk,dart-archive/dart-sdk,dart-archive/dart-sdk,dart-lang/sdk,dart-lang/sdk,dartino/dart-sdk