Fixes in WebComponent to match the latest dart:html in 0.5.14.3

lib/web_ui.dart

Index: lib/web_ui.dart
diff --git a/lib/web_ui.dart b/lib/web_ui.dart
index 68ff9c651e6c6f64ef19639e52e764b0cc7342b1..324f6d873e6b4c4b466dc8e698d5da00c163c34a 100644
--- a/lib/web_ui.dart
+++ b/lib/web_ui.dart
@@ -403,14 +403,19 @@ abstract class WebComponent implements Element {
   dynamic get on { throw new UnsupportedError('on is deprecated'); }
 
   String get contentEditable => host.contentEditable;
+  set contentEditable(String v) { host.contentEditable = v; }
 
   String get dir => host.dir;
+  set dir(String v) { host.dir = v; }
 
   bool get draggable => host.draggable;
+  set draggable(bool v) { host.draggable = v; }
 
   bool get hidden => host.hidden;
+  set hidden(bool v) { host.hidden = v; }
 
   String get id => host.id;
+  set id(String v) { host.id = v; }
 
   String get innerHTML => host.innerHtml;
 
@@ -426,23 +431,30 @@ abstract class WebComponent implements Element {
   bool get isContentEditable => host.isContentEditable;
 
   String get lang => host.lang;
+  set lang(String v) { host.lang = v; }
 
   String get outerHtml => host.outerHtml;
 
   bool get spellcheck => host.spellcheck;
+  set spellcheck(bool v) { host.spellcheck = v; }
 
   int get tabIndex => host.tabIndex;
+  set tabIndex(int i) { host.tabIndex = i; }
 
   String get title => host.title;
 
   set title(String value) { host.title = value; }
 
   bool get translate => host.translate;
+  set translate(bool v) { host.translate = v; }
 
   String get dropzone => host.dropzone;
+  set dropzone(String v) { host.dropzone = v; }
 
   void click() { host.click(); }
 
+  InputMethodContext getInputContext() => host.getInputContext();
+
   Element insertAdjacentElement(String where, Element element) =>
     host.insertAdjacentElement(where, element);
 
@@ -610,7 +622,9 @@ abstract class WebComponent implements Element {
   Node get $dom_lastChild => host.$dom_lastChild;
 
   String get localName => host.localName;
+  String get $dom_localName => host.$dom_localName;
 
+  String get namespaceUri => host.namespaceUri;
   String get $dom_namespaceUri => host.$dom_namespaceUri;
 
   int get nodeType => host.nodeType;