Adding deprecated flag to deprecated members.

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

Index: sdk/lib/html/templates/html/impl/impl_Element.darttemplate
diff --git a/sdk/lib/html/templates/html/impl/impl_Element.darttemplate b/sdk/lib/html/templates/html/impl/impl_Element.darttemplate
index aab5f014b9ca52dd8fdca8a33df7f541c1802639..bed96fcdf904fb52ca919cd2847a09c7d8ae8bc6 100644
--- a/sdk/lib/html/templates/html/impl/impl_Element.darttemplate
+++ b/sdk/lib/html/templates/html/impl/impl_Element.darttemplate
@@ -373,11 +373,14 @@ abstract class $CLASSNAME$EXTENDS$IMPLEMENTS$NATIVESPEC {
   /**
    * Deprecated, use innerHtml instead.
    */
+  @deprecated
   String get innerHTML => this.innerHtml;
+  @deprecated
   void set innerHTML(String value) {
     this.innerHtml = value;
   }
 
+  @deprecated
   void set elements(Collection<Element> value) {
     this.children = value;
   }
@@ -385,6 +388,7 @@ abstract class $CLASSNAME$EXTENDS$IMPLEMENTS$NATIVESPEC {
   /**
    * Deprecated, use [children] instead.
    */
+  @deprecated
   List<Element> get elements => this.children;
 
   /**