Adding support checks for partially supported element types and updating tests.

sdk/lib/html/dart2js/html_dart2js.dart

 library html;
 
 import 'dart:collection';
 import 'dart:html_common';
 import 'dart:indexed_db';
 import 'dart:isolate';
 import 'dart:json';
 import 'dart:svg' as svg;
 import 'dart:web_audio' as web_audio;
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
@@ skipping 1439 matching lines @@
   /// @domName Console.clear; @docsEditable true
   void clear(Object arg) native;
 
 }
 // 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.
 
 
 /// @domName HTMLContentElement; @docsEditable true
+@SupportedBrowser(SupportedBrowser.CHROME, '25')
+@Experimental()
 class ContentElement extends Element native "*HTMLContentElement" {
 
   ///@docsEditable true
   factory ContentElement() => document.$dom_createElement("content");
 
+  /**
+   * Checks if this type is supported on the current platform
+   */
+  static bool get supported => Element.isTagSupported('content');
+
   /// @domName HTMLContentElement.resetStyleInheritance; @docsEditable true
   bool resetStyleInheritance;
 
   /// @domName HTMLContentElement.select; @docsEditable true
   String select;
 
   /// @domName HTMLContentElement.getDistributedNodes; @docsEditable true
   @Returns('NodeList') @Creates('NodeList')
   List<Node> getDistributedNodes() native;
 }
@@ skipping 3797 matching lines @@
 
   /// @domName HTMLDListElement.compact; @docsEditable true
   bool compact;
 }
 // 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.
 
 
 /// @domName HTMLDataListElement; @docsEditable true
+@SupportedBrowser(SupportedBrowser.CHROME)
+@SupportedBrowser(SupportedBrowser.FIREFOX)
+@SupportedBrowser(SupportedBrowser.IE, '10')
+@SupportedBrowser(SupportedBrowser.SAFARI)
 class DataListElement extends Element native "*HTMLDataListElement" {
 
   ///@docsEditable true
   factory DataListElement() => document.$dom_createElement("datalist");
 
+  /**
+   * Checks if this type is supported on the current platform
+   */
+  static bool get supported => Element.isTagSupported('datalist');
+
   /// @domName HTMLDataListElement.options; @docsEditable true
   final HtmlCollection options;
 }
 // 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.
 
 
 /// @domName DataTransferItem; @docsEditable true
 class DataTransferItem native "*DataTransferItem" {
@@ skipping 196 matching lines @@
 
   /// @docsEditable true
   EventListenerList get message => this['message'];
 }
 // 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.
 
 
 /// @domName HTMLDetailsElement; @docsEditable true
+@SupportedBrowser(SupportedBrowser.CHROME)
+@SupportedBrowser(SupportedBrowser.SAFARI)
+@Experimental()
 class DetailsElement extends Element native "*HTMLDetailsElement" {
 
   ///@docsEditable true
   factory DetailsElement() => document.$dom_createElement("details");
 
+  /**
+   * Checks if this type is supported on the current platform
+   */
+  static bool get supported => Element.isTagSupported('details');
+
   /// @domName HTMLDetailsElement.open; @docsEditable true
   bool open;
 }
 // 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.
 
 
 /// @domName DeviceMotionEvent; @docsEditable true
 class DeviceMotionEvent extends Event native "*DeviceMotionEvent" {
@@ skipping 1847 matching lines @@
    * [tag] should be a valid HTML tag name. If [tag] is an unknown tag then
    * this will create an [UnknownElement].
    *
    *     var divElement = new Element.tag('div');
    *     print(divElement is DivElement); // 'true'
    *     var myElement = new Element.tag('unknownTag');
    *     print(myElement is UnknownElement); // 'true'
    *
    * For standard elements it is more preferable to use the type constructors:
    *     var element = new DivElement();
+   *
+   * See also:
+   *
+   * * [isTagSupported]
    */
   factory Element.tag(String tag) =>
       _ElementFactoryProvider.createElement_tag(tag);
 
   /**
    * All attributes on this element.
    *
    * Any modifications to the attribute map will automatically be applied to
    * this element.
    *
@@ skipping 193 matching lines @@
   }
 
   /**
    * Parses the specified text as HTML and adds the resulting node after the
    * last child of this element.
    */
   void appendHtml(String text) {
     this.insertAdjacentHtml('beforeend', text);
   }
 
+  /**
+   * Checks to see if the tag name is supported by the current platform.
+   *
+   * The tag should be a valid HTML tag name.
+   */
+  static bool isTagSupported(String tag) {
+    var e = _ElementFactoryProvider.createElement_tag(tag);
+    return e is Element && !(e is UnknownElement);
+  }
+
   // Hooks to support custom WebComponents.
   /**
    * Experimental support for [web components][wc]. This field stores a
    * reference to the component implementation. It was inspired by Mozilla's
    * [x-tags][] project. Please note: in the future it may be possible to
    * `extend Element` from your class, in which case this field will be
    * deprecated and will simply return this [Element] object.
    *
    * [wc]: http://dvcs.w3.org/hg/webcomponents/raw-file/tip/explainer/index.html
    * [x-tags]: http://x-tags.org/
@@ skipping 376 matching lines @@
       throw new ArgumentError('HTML had ${temp.children.length} '
           'top level elements but 1 expected');
     }
     element.remove();
     return element;
   }
 
   /** @domName Document.createElement */
   // Optimization to improve performance until the dart2js compiler inlines this
   // method.
-  static Element createElement_tag(String tag) =>
+  static dynamic createElement_tag(String tag) =>
       JS('Element', 'document.createElement(#)', tag);
 }
 // 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.
 
 
 class ElementEvents extends Events {
   ElementEvents(EventTarget _ptr) : super(_ptr);
 
@@ skipping 168 matching lines @@
   Element nextElementSibling;
 
   Element previousElementSibling;
 }
 // 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.
 
 
 /// @domName HTMLEmbedElement; @docsEditable true
+@SupportedBrowser(SupportedBrowser.CHROME)
+@SupportedBrowser(SupportedBrowser.IE)
+@SupportedBrowser(SupportedBrowser.SAFARI)
 class EmbedElement extends Element native "*HTMLEmbedElement" {
 
   ///@docsEditable true
   factory EmbedElement() => document.$dom_createElement("embed");
 
+  /**
+   * Checks if this type is supported on the current platform
+   */
+  static bool get supported => Element.isTagSupported('embed');
+
   /// @domName HTMLEmbedElement.align; @docsEditable true
   String align;
 
   /// @domName HTMLEmbedElement.height; @docsEditable true
   String height;
 
   /// @domName HTMLEmbedElement.name; @docsEditable true
   String name;
 
   /// @domName HTMLEmbedElement.src; @docsEditable true
@@ skipping 3749 matching lines @@
   /// @domName KeyboardEvent.shiftKey; @docsEditable true
   final bool shiftKey;
 
 }
 // 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.
 
 
 /// @domName HTMLKeygenElement; @docsEditable true
+@SupportedBrowser(SupportedBrowser.CHROME)
+@SupportedBrowser(SupportedBrowser.SAFARI)
+@Experimental()
 class KeygenElement extends Element native "*HTMLKeygenElement" {
 
   ///@docsEditable true
   factory KeygenElement() => document.$dom_createElement("keygen");
 
+  /**
+   * Checks if this type is supported on the current platform
+   */
+  static bool get supported => Element.isTagSupported('keygen') && (new Element.tag('keygen') is KeygenElement);
+
   /// @domName HTMLKeygenElement.autofocus; @docsEditable true
   bool autofocus;
 
   /// @domName HTMLKeygenElement.challenge; @docsEditable true
   String challenge;
 
   /// @domName HTMLKeygenElement.disabled; @docsEditable true
   bool disabled;
 
   /// @domName HTMLKeygenElement.form; @docsEditable true
@@ skipping 205 matching lines @@
   String name;
 }
 // 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.
 
 
 /// @domName HTMLMarqueeElement; @docsEditable true
 class MarqueeElement extends Element native "*HTMLMarqueeElement" {
 
+  /**
+   * Checks if this type is supported on the current platform
+   */
+  static bool get supported => Element.isTagSupported('marquee')&& (new Element.tag('marquee') is MarqueeElement);
+
   /// @domName HTMLMarqueeElement.behavior; @docsEditable true
   String behavior;
 
   /// @domName HTMLMarqueeElement.bgColor; @docsEditable true
   String bgColor;
 
   /// @domName HTMLMarqueeElement.direction; @docsEditable true
   String direction;
 
   /// @domName HTMLMarqueeElement.height; @docsEditable true
@@ skipping 864 matching lines @@
 // WARNING: Do not edit - generated code.
 
 
 typedef void MetadataCallback(Metadata metadata);
 // 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.
 
 
 /// @domName HTMLMeterElement; @docsEditable true
+@SupportedBrowser(SupportedBrowser.CHROME)
+@SupportedBrowser(SupportedBrowser.FIREFOX)
+@SupportedBrowser(SupportedBrowser.SAFARI)
 class MeterElement extends Element native "*HTMLMeterElement" {
 
   ///@docsEditable true
   factory MeterElement() => document.$dom_createElement("meter");
 
+  /**
+   * Checks if this type is supported on the current platform
+   */
+  static bool get supported => Element.isTagSupported('meter');
+
   /// @domName HTMLMeterElement.high; @docsEditable true
   num high;
 
   /// @domName HTMLMeterElement.labels; @docsEditable true
   @Returns('NodeList') @Creates('NodeList')
   final List<Node> labels;
 
   /// @domName HTMLMeterElement.low; @docsEditable true
   num low;
 
@@ skipping 1205 matching lines @@
 
   /// @domName HTMLOListElement.type; @docsEditable true
   String type;
 }
 // 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.
 
 
 /// @domName HTMLObjectElement; @docsEditable true
+@SupportedBrowser(SupportedBrowser.CHROME)
+@SupportedBrowser(SupportedBrowser.FIREFOX)
+@SupportedBrowser(SupportedBrowser.SAFARI)
 class ObjectElement extends Element native "*HTMLObjectElement" {
 
   ///@docsEditable true
   factory ObjectElement() => document.$dom_createElement("object");
 
+  /**
+   * Checks if this type is supported on the current platform
+   */
+  static bool get supported => Element.isTagSupported('object');
+
   /// @domName HTMLObjectElement.align; @docsEditable true
   String align;
 
   /// @domName HTMLObjectElement.archive; @docsEditable true
   String archive;
 
   /// @domName HTMLObjectElement.border; @docsEditable true
   String border;
 
   /// @domName HTMLObjectElement.code; @docsEditable true
@@ skipping 185 matching lines @@
 
   /// @domName HTMLOptionElement.value; @docsEditable true
   String value;
 }
 // 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.
 
 
 /// @domName HTMLOutputElement; @docsEditable true
+@SupportedBrowser(SupportedBrowser.CHROME)
+@SupportedBrowser(SupportedBrowser.FIREFOX)
+@SupportedBrowser(SupportedBrowser.SAFARI)
 class OutputElement extends Element native "*HTMLOutputElement" {
 
   ///@docsEditable true
   factory OutputElement() => document.$dom_createElement("output");
 
+  /**
+   * Checks if this type is supported on the current platform
+   */
+  static bool get supported => Element.isTagSupported('output');
+
   /// @domName HTMLOutputElement.defaultValue; @docsEditable true
   String defaultValue;
 
   /// @domName HTMLOutputElement.form; @docsEditable true
   final FormElement form;
 
   /// @domName HTMLOutputElement.htmlFor; @docsEditable true
   DomSettableTokenList htmlFor;
 
   /// @domName HTMLOutputElement.labels; @docsEditable true
@@ skipping 329 matching lines @@
 
   /// @domName ProcessingInstruction.target; @docsEditable true
   final String target;
 }
 // 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.
 
 
 /// @domName HTMLProgressElement; @docsEditable true
+@SupportedBrowser(SupportedBrowser.CHROME)
+@SupportedBrowser(SupportedBrowser.FIREFOX)
+@SupportedBrowser(SupportedBrowser.IE, '10')
+@SupportedBrowser(SupportedBrowser.SAFARI)
 class ProgressElement extends Element native "*HTMLProgressElement" {
 
   ///@docsEditable true
   factory ProgressElement() => document.$dom_createElement("progress");
 
+  /**
+   * Checks if this type is supported on the current platform
+   */
+  static bool get supported => Element.isTagSupported('progress');
+
   /// @domName HTMLProgressElement.labels; @docsEditable true
   @Returns('NodeList') @Creates('NodeList')
   final List<Node> labels;
 
   /// @domName HTMLProgressElement.max; @docsEditable true
   num max;
 
   /// @domName HTMLProgressElement.position; @docsEditable true
   final num position;
 
@@ skipping 2940 matching lines @@
 
   /// @domName TouchList.item; @docsEditable true
   Touch item(int index) native;
 }
 // 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.
 
 
 /// @domName HTMLTrackElement; @docsEditable true
+@SupportedBrowser(SupportedBrowser.CHROME)
+@SupportedBrowser(SupportedBrowser.IE, '10')
+@SupportedBrowser(SupportedBrowser.SAFARI)
 class TrackElement extends Element native "*HTMLTrackElement" {
 
   ///@docsEditable true
   factory TrackElement() => document.$dom_createElement("track");
 
+  /**
+   * Checks if this type is supported on the current platform
+   */
+  static bool get supported => Element.isTagSupported('track');
+
   static const int ERROR = 3;
 
   static const int LOADED = 2;
 
   static const int LOADING = 1;
 
   static const int NONE = 0;
 
   /// @domName HTMLTrackElement.defaultValue; @docsEditable true
   @JSName('default')
@@ skipping 7460 matching lines @@
   T next() {
     if (!hasNext) {
       throw new StateError("No more elements");
     }
     return _array[_pos++];
   }
 
   final List<T> _array;
   int _pos;
 }