Update to use one less proxy per element

lib/src/common/polymer_descriptor.dart

Index: lib/src/common/polymer_descriptor.dart
diff --git a/lib/src/common/polymer_descriptor.dart b/lib/src/common/polymer_descriptor.dart
index 285c32d3bda1a9a243537d3ccd2f795cbc3c4567..fc426cddebf160c56f731a9a2d748242f50dcdcc 100644
--- a/lib/src/common/polymer_descriptor.dart
+++ b/lib/src/common/polymer_descriptor.dart
@@ -242,10 +242,11 @@ Iterable<JsObject> _buildBehaviorsList(Type type) {
     finalBehaviors.add(behavior);
   }
 
-  return finalBehaviors.map((ClassMirror behavior) {
-    BehaviorAnnotation meta = behavior.metadata.firstWhere(_isBehavior);
-    return meta.getBehavior(behavior.reflectedType);
-  });
+  return <JsObject>[_polymerDart['Behavior']]

[Siggi Cherem (dart-lang), 2015/09/17 21:11:59]

maybe we should rename Polymer.Dart.Behavior to something more self-explanatory?

Ideas:

Polymer.Dart.InteropBehavior
Polymer.Dart.PolymerInteropBehavior
Polymer.Dart.BindingInteropBehavior

alternatively, add a comment here explaining why this behavior is always on by
default.

[jakemac, 2015/09/23 17:37:08]

Changed to InteropBehavior

+    ..addAll(finalBehaviors.map((ClassMirror behavior) {
+      BehaviorAnnotation meta = behavior.metadata.firstWhere(_isBehavior);
+      return meta.getBehavior(behavior.reflectedType);
+    }));
 }
 
 // Throws an error about expected mixins that must precede the [clazz] mixin.