Revert "Adding Element.AddHTML and Element.addText methods."

lib/html/dartium/html_dartium.dart

Index: lib/html/dartium/html_dartium.dart
diff --git a/lib/html/dartium/html_dartium.dart b/lib/html/dartium/html_dartium.dart
index c609cbda282ae686c95b1e2c674748ec321136c9..193777a97bd1343ad9347db35d68ad69374790c6 100644
--- a/lib/html/dartium/html_dartium.dart
+++ b/lib/html/dartium/html_dartium.dart
@@ -5918,14 +5918,6 @@ class _DocumentFragmentImpl extends _NodeImpl implements DocumentFragment {
     this._insertAdjacentNode(where, new DocumentFragment.html(text));
   }
 
-  void addText(String text) {
-    this.insertAdjacentText('beforeend', text);
-  }
-
-  void addHTML(String text) {
-    this.insertAdjacentHTML('beforeend', text);
-  }
-
   Future<ElementRect> get rect() {
     return _createMeasurementFuture(() => const EmptyElementRect(),
                                     new Completer<ElementRect>());
@@ -7112,14 +7104,14 @@ class _ElementRectImpl implements ElementRect {
 
   // TODO(jacobr): should we move these outside of ElementRect to avoid the
   // overhead of computing them every time even though they are rarely used.
-  final _ClientRectImpl _boundingClientRect;
+  final _ClientRectImpl _boundingClientRect; 
   final _ClientRectListImpl _clientRects;
 
   _ElementRectImpl(_ElementImpl element) :
     client = new _SimpleClientRect(element.$dom_clientLeft,
                                   element.$dom_clientTop,
-                                  element.$dom_clientWidth,
-                                  element.$dom_clientHeight),
+                                  element.$dom_clientWidth, 
+                                  element.$dom_clientHeight), 
     offset = new _SimpleClientRect(element.$dom_offsetLeft,
                                   element.$dom_offsetTop,
                                   element.$dom_offsetWidth,
@@ -7208,14 +7200,6 @@ class _ElementImpl extends _NodeImpl implements Element {
         new Completer<CSSStyleDeclaration>());
   }
 
-  void addText(String text) {
-    this.insertAdjacentText('beforeend', text);
-  }
-
-  void addHTML(String text) {
-    this.insertAdjacentHTML('beforeend', text);
-  }
-
   // Hooks to support custom WebComponents.
   var xtag;
 
@@ -7228,7 +7212,6 @@ class _ElementImpl extends _NodeImpl implements Element {
   }
 
 
-
   _ElementEventsImpl get on() =>
     new _ElementEventsImpl(this);
 
@@ -26678,17 +26661,6 @@ interface Element extends Node, NodeSelector default _ElementFactoryProvider {
   void set dataAttributes(Map<String, String> value);
 
   /**
-   * Adds the specified text as a text node after the last child of this.
-   */
-  void addText(String text);
-
-  /**
-   * Parses the specified text as HTML and adds the resulting node after the
-   * last child of this.
-   */
-  void addHTML(String html);
-
-  /**
    * @domName getClientRects, getBoundingClientRect, clientHeight, clientWidth,
    * clientTop, clientLeft, offsetHeight, offsetWidth, offsetTop, offsetLeft,
    * scrollHeight, scrollWidth, scrollTop, scrollLeft