Revert "Remove @deprecated features."

pkg/intl/lib/bidi_formatter.dart

Index: pkg/intl/lib/bidi_formatter.dart
diff --git a/pkg/intl/lib/bidi_formatter.dart b/pkg/intl/lib/bidi_formatter.dart
index 048a9deb6d2915d974dc9da8c157973c8214ad39..0e5bee674fe9402fc742cb559a5bc5e3f68916f4 100644
--- a/pkg/intl/lib/bidi_formatter.dart
+++ b/pkg/intl/lib/bidi_formatter.dart
@@ -82,6 +82,18 @@ class BidiFormatter {
   bool get isRTL => contextDirection == TextDirection.RTL;
 
   /**
+   * Escapes HTML-special characters of [text] so that the result can be
+   * included verbatim in HTML source code, either in an element body or in an
+   * attribute value.
+   *
+   * *htmlEscape* is deprecated. Use [HtmlEscape] from the `dart:convert`
+   * package. *htmlEscape* will be removed the 30th of September 2013.
+   */
+  // TODO(kevmoo) Remove this!
+  @deprecated
+  String htmlEscape(String text) => HTML_ESCAPE.convert(text);
+
+  /**
    * Formats a string of a given (or estimated, if not provided)
    * [direction] for use in HTML output of the context directionality, so
    * an opposite-directionality string is neither garbled nor garbles what