Deprecating Element.elements for Element.children.

sdk/lib/html/templates/html/impl/impl_DocumentFragment.darttemplate

Index: sdk/lib/html/templates/html/impl/impl_DocumentFragment.darttemplate
diff --git a/sdk/lib/html/templates/html/impl/impl_DocumentFragment.darttemplate b/sdk/lib/html/templates/html/impl/impl_DocumentFragment.darttemplate
index 98185a47c1f14c9b70a6fa0d1777bbeb76d8c4b8..22ec7403bd93f6b1645233718460c84959fc0ab5 100644
--- a/sdk/lib/html/templates/html/impl/impl_DocumentFragment.darttemplate
+++ b/sdk/lib/html/templates/html/impl/impl_DocumentFragment.darttemplate
@@ -28,22 +28,30 @@ class $CLASSNAME$EXTENDS$IMPLEMENTS$NATIVESPEC {
   factory $CLASSNAME.svg(String svgContent) =>
       _$(CLASSNAME)FactoryProvider.createDocumentFragment_svg(svgContent);
 
-  List<Element> _elements;
+  List<Element> get elements => this.children;
 
-  List<Element> get elements {
-    if (_elements == null) {
-      _elements = new FilteredElementList(this);
+  // TODO: The type of value should be Collection<Element>. See http://b/5392897
+  void set elements(value) {
+    this.children = value;
+  }
+
+  // Native field is used only by Dart code so does not lead to instantiation
+  // of native classes
+  @Creates('Null')
+  List<Element> _children;
+  List<Element> get children {
+    if (_children == null) {
+      _children = new FilteredElementList(this);
     }
-    return _elements;
+    return _children;
   }
 
-  // TODO: The type of value should be Collection<Element>. See http://b/5392897
-  void set elements(value) {
+  void set children(Collection<Element> value) {
     // Copy list first since we don't want liveness during iteration.
     List copy = new List.from(value);
-    final elements = this.elements;
-    elements.clear();
-    elements.addAll(copy);
+    var children = this.children;
+    children.clear();
+    children.addAll(copy);
   }
 
   Element query(String selectors) => $dom_querySelector(selectors);