Clean up SkyElement

sky/framework/sky-element/sky-element.sky

Index: sky/framework/sky-element/sky-element.sky
diff --git a/sky/framework/sky-element/sky-element.sky b/sky/framework/sky-element/sky-element.sky
index 35578725d86c927f38e68d4fb4c08d1c2be3828f..c064255a71039288b1587cab39f90f385b50b54a 100644
--- a/sky/framework/sky-element/sky-element.sky
+++ b/sky/framework/sky-element/sky-element.sky
@@ -4,60 +4,51 @@
 // found in the LICENSE file.
 -->
 <link rel="import" href="TemplateBinding.sky" />
-
 <script>
-(function(global) {
-  'use strict';
-
-  var Base = {
-
-    __proto__: HTMLElement.prototype,
-
-    register: function() {
-      // |this| is prototype
-      var template = document.currentScript.previousElementSibling;
-      if (template && template.localName == 'template') {
-        this.template_ = template;
-      }
-    },
-
-    createdCallback: function() {
-    },
-
-    attachedCallback: function() {
-      var shadow = this.createShadowRoot();
-      shadow.appendChild(this.template_.createInstance(this));
-      this.attached();
-    },
-
-    attached: function() {
-      // override
-    },
-
-    dettachedCallback: function() {
-      this.dettached();
-    },
-
-    dettached: function() {
-      // override
-    },
-
-    attributeChangedCallback: function(attrName, oldValue, newValue) {
-      // reserved for canonical behavior
-      this.attributeChanged(attrName, oldValue, newValue);
-    },
-
-    attributeChanged: function(attrName, oldValue, newValue) {
-      // override
-    }
-  };
-
-  function SkyElement(prototype) {
-    prototype.__proto__ = Base;
-    document.registerElement(prototype.name, { prototype: prototype });
-    prototype.register();
-  };
-
-  module.exports = SkyElement;
-})(this);
+var Base = Object.create(HTMLElement.prototype, {
+  register: function() {
+    // |this| is prototype
+    var template = document.currentScript.previousElementSibling;
+    if (template && template.localName == 'template')
+      this.template_ = template;
+  },
+
+  createdCallback: function() {
+  },
+
+  attachedCallback: function() {
+    var shadow = this.createShadowRoot();
+    shadow.appendChild(this.template_.createInstance(this));
+    this.attached();
+  },
+
+  attached: function() {
+    // override
+  },
+
+  dettachedCallback: function() {
+    this.dettached();
+  },
+
+  dettached: function() {
+    // override
+  },
+
+  attributeChangedCallback: function(attrName, oldValue, newValue) {
+    // reserved for canonical behavior
+    this.attributeChanged(attrName, oldValue, newValue);
+  },
+
+  attributeChanged: function(attrName, oldValue, newValue) {
+    // override
+  },
+};
+
+function SkyElement(prototype) {
+  prototype.__proto__ = Base;
+  document.registerElement(prototype.name, { prototype: prototype });
+  prototype.register();
+};
+
+module.exports = SkyElement;
 </script>