Add "deprecated" to the standard library.

pkg/meta/lib/meta.dart

Index: pkg/meta/lib/meta.dart
diff --git a/pkg/meta/lib/meta.dart b/pkg/meta/lib/meta.dart
index e3e4a250753c5b613716ce9f3c75b2298a663389..98177b92913816ee736f420cf3dafe9fc5ca4c4f 100644
--- a/pkg/meta/lib/meta.dart
+++ b/pkg/meta/lib/meta.dart
@@ -4,8 +4,10 @@
 
 /**
  * Constants for use in metadata annotations such as
- * `@deprecated`, `@override`, and `@proxy`.
- * 
+ * `@proxy`.
+ *
+ * See also `@deprecated` and `@override` in the `dart:core` library.
+ *
  * Annotations provide semantic information
  * that tools can use to provide a better user experience.
  * For example, an IDE might not autocomplete
@@ -22,29 +24,6 @@
 library meta;
 
 /**
- * An annotation used to mark a class, field, getter, setter, method, top-level
- * variable, or top-level function as one that should no longer be used. Tools
- * can use this annotation to provide a warning on references to the marked
- * element.
- */
-const deprecated = const _Deprecated();
-
-class _Deprecated {
-  const _Deprecated();
-}
-
-/**
- * An annotation used to mark an instance member (method, field, getter or
- * setter) as overriding an inherited class member. Tools can use this
- * annotation to provide a warning if there is no overridden member.
- */
-const override = const _Override();
-
-class _Override {
-  const _Override();
-}
-
-/**
  * An annotation used to mark a class that should be considered to implement
  * every possible getter, setter and method. Tools can use this annotation to
  * suppress warnings when there is no explicit implementation of a referenced
@@ -57,4 +36,4 @@ const proxy = const _Proxy();
 
 class _Proxy {
   const _Proxy();
-}
+}