Changes to make it easier to add elements.

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 d475ddfc6e313c3ca491175cb02f49070014e9e9..ae3f16db2855d0c696235d7d8178dca0598112a6 100644
--- a/sdk/lib/html/templates/html/impl/impl_Element.darttemplate
+++ b/sdk/lib/html/templates/html/impl/impl_Element.darttemplate
@@ -592,9 +592,16 @@ abstract class $CLASSNAME$EXTENDS$IMPLEMENTS$NATIVESPEC {
   }
 
   /**
+   * Adds the specified element to after the last child of this.
+   */
+  void append(Element e) {
+    this.children.add(e);
+  }
+
+  /**
    * Adds the specified text as a text node after the last child of this.
    */
-  void addText(String text) {
+  void appendText(String text) {
     this.insertAdjacentText('beforeend', text);
   }
 
@@ -602,7 +609,7 @@ abstract class $CLASSNAME$EXTENDS$IMPLEMENTS$NATIVESPEC {
    * Parses the specified text as HTML and adds the resulting node after the
    * last child of this.
    */
-  void addHtml(String text) {
+  void appendHtml(String text) {
     this.insertAdjacentHTML('beforeend', text);
   }