Reapply "Rename mappedBy to map."

tools/dom/templates/html/impl/impl_Element.darttemplate

Index: tools/dom/templates/html/impl/impl_Element.darttemplate
diff --git a/tools/dom/templates/html/impl/impl_Element.darttemplate b/tools/dom/templates/html/impl/impl_Element.darttemplate
index 752c93f479f557f2798e39357ca98b4c2736471e..aac9b24df34756285fb4ea39090cdc6d182db4bf 100644
--- a/tools/dom/templates/html/impl/impl_Element.darttemplate
+++ b/tools/dom/templates/html/impl/impl_Element.darttemplate
@@ -61,6 +61,10 @@ class _ChildrenElementList implements List {
     return IterableMixinWorkaround.joinList(this, separator);
   }
 
+  Iterable map(f(Element element)) {
+    return IterableMixinWorkaround.map(this, f);
+  }
+
   List mappedBy(f(Element element)) {
     return IterableMixinWorkaround.mappedByList(this, f);
   }
@@ -73,7 +77,7 @@ class _ChildrenElementList implements List {
     return _element.$dom_firstElementChild == null;
   }
 
-  List<Element> take(int n) {
+  Iterable<Element> take(int n) {
     return IterableMixinWorkaround.takeList(this, n);
   }
 
@@ -81,7 +85,7 @@ class _ChildrenElementList implements List {
     return IterableMixinWorkaround.takeWhile(this, test);
   }
 
-  List<Element> skip(int n) {
+  Iterable<Element> skip(int n) {
     return IterableMixinWorkaround.skipList(this, n);
   }
 
@@ -274,6 +278,10 @@ class _FrozenElementList implements List {
     return IterableMixinWorkaround.joinList(this, separator);
   }
 
+  Iterable map(f(Element element)) {
+    return IterableMixinWorkaround.map(this, f);
+  }
+
   List mappedBy(f(Element element)) {
     return IterableMixinWorkaround.mappedByList(this, f);
   }
@@ -303,7 +311,7 @@ class _FrozenElementList implements List {
   List<Element> toList() => new List<Element>.from(this);
   Set<Element> toSet() => new Set<Element>.from(this);
 
-  List<Element> take(int n) {
+  Iterable<Element> take(int n) {
     return IterableMixinWorkaround.takeList(this, n);
   }
 
@@ -311,7 +319,7 @@ class _FrozenElementList implements List {
     return IterableMixinWorkaround.takeWhile(this, test);
   }
 
-  List<Element> skip(int n) {
+  Iterable<Element> skip(int n) {
     return IterableMixinWorkaround.skipList(this, n);
   }