Revert "Rename mappedBy to map."

sdk/lib/async/stream.dart

Index: sdk/lib/async/stream.dart
diff --git a/sdk/lib/async/stream.dart b/sdk/lib/async/stream.dart
index 8074170946b6a30c78d5269bf389be7bb926279e..3911b674b26759c78a6a9dfac99c488a4f0dffb8 100644
--- a/sdk/lib/async/stream.dart
+++ b/sdk/lib/async/stream.dart
@@ -129,18 +129,11 @@ abstract class Stream<T> {
    * Create a new stream that converts each element of this stream
    * to a new value using the [convert] function.
    */
-  Stream map(convert(T event)) {
+  Stream mappedBy(convert(T event)) {
     return new _MapStream<T, dynamic>(this, convert);
   }
 
   /**
-   * Deprecated alias for [map].
-   *
-   * @deprecated
-   */
-  Stream mappedBy(f(E element)) => map(f);
-
-  /**
    * Create a wrapper Stream that intercepts some errors from this stream.
    *
    * If this stream sends an error that matches [test], then it is intercepted