Get rid of a lot of () for getters.

samples/webcomponents/shadow_polyfill.dart

 // Copyright (c) 2011, 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.
 
 /**
  * Polyfill script for custom elements. To use this script, your app must
  * create a CustomElementsManager with the appropriate lookup function before
  * doing any DOM queries or modifications.
  * Currently, all custom elements must be registered with the polyfill.  To
  * register custom elements, provide the appropriate lookup function to your
@@ skipping 11 matching lines @@
 
 #source('list_map.dart');
 
 // typedefs
 typedef WebComponent WebComponentFactory (ShadowRoot shadowRoot, Element elt);
 typedef WebComponentFactory RegistryLookupFunction(String tagName);
 
 // Globals
 const int REQUEST_DONE = 4;
 CustomElementsManager _manager;
-CustomElementsManager get manager() => _manager;
+CustomElementsManager get manager => _manager;
 
 void initializeComponents(RegistryLookupFunction lookup) {
   _manager = new CustomElementsManager._internal(lookup);
   manager._loadComponents();
 }
 
 /** A Dart wrapper for a web component. */
 abstract class WebComponent {
   /** The web component element wrapped by this class. */
-  abstract Element get element();
+  abstract Element get element;
 
   /** Invoked when this component gets created. */
   abstract void created();
 
   /** Invoked when this component gets inserted in the DOM tree. */
   abstract void inserted();
 
   /** Invoked when any attribute of the component is modified. */
   abstract void attributeChanged(
       String name, String oldValue, String newValue);
@@ skipping 173 matching lines @@
   }
 }
 
 bool _hasShadowRoot;
 
 /**
  * True if the browser supports the [ShadowRoot] element and it is enabled.
  * See the [Shadow DOM spec](http://www.w3.org/TR/shadow-dom/) for more
  * information about the ShadowRoot.
  */
-bool get hasShadowRoot() {
+bool get hasShadowRoot {
   if (_hasShadowRoot == null) {
     try {
       // TODO(jmesserly): it'd be nice if we could check this without causing
       // an exception to be thrown.
       new ShadowRoot(new DivElement());
       _hasShadowRoot = true;
     } catch (e) {
       _hasShadowRoot = false;
       // Hide <template> elements.
       // TODO(jmesserly): This is a workaround because we don't distribute
@@ skipping 91 matching lines @@
       }
     });
     attributeObserver.observe(e, attributes: true, attributeOldValue: true);
 
     // Listen for all insertions and deletions on the DOM so that we can
     // catch custom elements being inserted and call the appropriate callbacks.
     manager.initializeInsertedRemovedCallbacks(shadowRoot);
     return newCustomElement;
   }
 }