Revert "Dartium w/ JsInterop enabled"

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

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 part of $LIBRARYNAME;
 
 @DocsEditable()
 $(ANNOTATIONS)$(NATIVESPEC)$(CLASS_MODIFIERS)class $CLASSNAME extends Node
 {
 
 $!MEMBERS
   /**
    * Finds all descendant elements of this document that match the specified
    * group of selectors.
    *
    * Unless your webpage contains multiple documents, the top-level
    * [querySelectorAll]
    * method behaves the same as this method, so you should use it instead to
    * save typing a few characters.
    *
    * [selectors] should be a string using CSS selector syntax.
    *
    *     var items = document.querySelectorAll('.itemClassName');
    *
    * For details about CSS selector syntax, see the
    * [CSS selector specification](http://www.w3.org/TR/css3-selectors/).
    */
   ElementList<Element> querySelectorAll(String selectors) {
+$if JSINTEROP
+    return _querySelectorAll(selectors);
+$else
     return new _FrozenElementList._wrap(_querySelectorAll(selectors));
+$endif
   }
 
   /**
    * Alias for [querySelector]. Note this function is deprecated because its
    * semantics will be changing in the future.
    */
   @deprecated
   @Experimental()
   @DomName('Document.querySelector')
   Element query(String relativeSelectors) => querySelector(relativeSelectors);
@@ skipping 19 matching lines @@
 
   /// *Deprecated*: use [supportsRegisterElement] instead.
   @deprecated
   bool get supportsRegister => supportsRegisterElement;
 
   @DomName('Document.createElement')
   Element createElement(String tagName, [String typeExtension]) {
 $if DART2JS
     return _createElement(tagName, typeExtension);
 $else
-    var newElement = (typeExtension == null) ?
-      _blink.BlinkDocument.instance.createElement_Callback_1_(unwrap_jso(this), tagName) :
-      _blink.BlinkDocument.instance.createElement_Callback_2_(unwrap_jso(this), tagName, typeExtension);
-
-    var wrapped;
-
-    if (newElement['dart_class'] != null) {
-      wrapped = newElement['dart_class'];         // Here's our Dart class.
-      wrapped.blink_jsObject = newElement;
-    } else {
-      wrapped = wrap_jso(newElement);
-      if (wrapped == null) {
-        wrapped = wrap_jso_custom_element(newElement);
-      }
-    }
-
-    return wrapped;
+  $if JSINTEROP
+    return _createElement(tagName, typeExtension);
+  $else
+    if (typeExtension != null) {  
+      return _createElement(tagName, typeExtension);  
+    } else {  
+      // Fast-path for Dartium when typeExtension is not needed.  
+      return _Utils.createElement(this, tagName); 
+    } 
+  $endif
 $endif
   }
 
-  @DomName('Document.createElementNS')
-  @DocsEditable()
-  Element createElementNS(String namespaceURI, String qualifiedName, [String typeExtension]) {
-$if DART2JS
-    return _createElementNS(tagName, qualifiedName, typeExtension);
-$else
-    var newElement = (typeExtension == null) ?
-      _blink.BlinkDocument.instance.createElementNS_Callback_2_(unwrap_jso(this), namespaceURI, qualifiedName) :
-      _blink.BlinkDocument.instance.createElementNS_Callback_3_(unwrap_jso(this), namespaceURI, qualifiedName, typeExtension);
-  
-    var wrapped;
-  
-    if (newElement['dart_class'] != null) {
-      wrapped = newElement['dart_class'];         // Here's our Dart class.
-      wrapped.blink_jsObject = newElement;
-    } else {
-      wrapped = wrap_jso(newElement);
-      if (wrapped == null) {
-        wrapped = wrap_jso_custom_element(newElement);
-      }
-    }
-  
-    return wrapped;
-$endif
-  }
-
 $if DART2JS
   @DomName('Document.createNodeIterator')
   NodeIterator _createNodeIterator(Node root,
       [int whatToShow, NodeFilter filter])
       => JS('NodeIterator', '#.createNodeIterator(#, #, #, false)',
           this, root, whatToShow, filter);
 
   @DomName('Document.createTreeWalker')
   TreeWalker _createTreeWalker(Node root,
       [int whatToShow, NodeFilter filter])
       => JS('TreeWalker', '#.createTreeWalker(#, #, #, false)',
           this, root, whatToShow, filter);
 $endif
 }