Added method map to Collection interface and all its implementations (except classes generated fr...

compiler/lib/implementation/array.dart

Index: compiler/lib/implementation/array.dart
===================================================================
--- compiler/lib/implementation/array.dart	(revision 3161)
+++ compiler/lib/implementation/array.dart	(working copy)
@@ -76,6 +76,10 @@
     Collections.forEach(this, f);
   }
 
+  Collection map(f(T element)) {
+    return Collections.map(this, new List(), f);
+  }
+
   Collection<T> filter(bool f(T element)) {
     return Collections.filter(this, new List<T>(), f);
   }