Revert "Rename mappedBy to map."

tools/dom/templates/immutable_list_mixin.darttemplate

Index: tools/dom/templates/immutable_list_mixin.darttemplate
diff --git a/tools/dom/templates/immutable_list_mixin.darttemplate b/tools/dom/templates/immutable_list_mixin.darttemplate
index becce42f2001f484355b6958802b1e6722a4adfe..00709742ae4e60ec76d76ee6b20efbb6c494cb8f 100644
--- a/tools/dom/templates/immutable_list_mixin.darttemplate
+++ b/tools/dom/templates/immutable_list_mixin.darttemplate
@@ -29,11 +29,7 @@ $endif
   String join([String separator]) =>
       IterableMixinWorkaround.joinList(this, separator);
 
-  Iterable map(f($E element)) =>
-      IterableMixinWorkaround.map(this, f);
-
-  List mappedBy(f($E element)) =>
-      IterableMixinWorkaround.mappedBy(this, f);
+  List mappedBy(f($E element)) => IterableMixinWorkaround.mappedByList(this, f);
 
   Iterable<$E> where(bool f($E element)) =>
       IterableMixinWorkaround.where(this, f);
@@ -47,13 +43,13 @@ $endif
 
   bool get isEmpty => this.length == 0;
 
-  Iterable<$E> take(int n) => IterableMixinWorkaround.takeList(this, n);
+  List<$E> take(int n) => IterableMixinWorkaround.takeList(this, n);
 
   Iterable<$E> takeWhile(bool test($E value)) {
     return IterableMixinWorkaround.takeWhile(this, test);
   }
 
-  Iterable<$E> skip(int n) => IterableMixinWorkaround.skipList(this, n);
+  List<$E> skip(int n) => IterableMixinWorkaround.skipList(this, n);
 
   Iterable<$E> skipWhile(bool test($E value)) {
     return IterableMixinWorkaround.skipWhile(this, test);