fix indentation and make sure style placeholder should be created 1x only.

Author: Steven Orvell

src/elements/element.html

@@ -68,17 +68,17 @@
 
       static get observedAttributes() {
         if (!this.hasOwnProperty('_observedAttributes')) {
+          // observedAttributes must be finalized at registration time
+          this._observedAttributes = this.addPropertiesToAttributes(
+            this._flattenedProperties, []);
           // TODO(kschaaf): revisit: capture import document, to aid finding dom-module
-        var currentScript = document._currentScript || document.currentScript;
-        this.__importDoc = currentScript && currentScript.ownerDocument;
-        // observedAttributes must be finalized at registration time
-        this._observedAttributes = this.addPropertiesToAttributes(
-          this._flattenedProperties, []);
-        }
-        // TODO(sorvell): define time cheat. Should we patch customElements.define
-        // instead?
-        if (!Polymer.StyleLib.nativeShadow) {
-          this.__placeholder = Polymer.StyleLib.applyStylePlaceHolder(this.is);
+          var currentScript = document._currentScript || document.currentScript;
+          this.__importDoc = currentScript && currentScript.ownerDocument;
+          // TODO(sorvell): define time cheat. Should we patch
+          // customElements.define instead?
+          if (!Polymer.StyleLib.nativeShadow) {
+            this.__placeholder = Polymer.StyleLib.applyStylePlaceHolder(this.is);
+          }
         }
         return this._observedAttributes;
       }