Avoid stomping on property objects when mixing behaviors.

polymer.html

@@ -42,12 +42,12 @@ subject to an additional IP rights grant found at http://polymer.github.io/PATEN
       this._prepEffects();
       // shared behaviors
       this._prepBehaviors();
+      // fast access to property info
+      this._prepPropertyInfo();
       // accessors part 2
       this._prepBindings();
       // dom encapsulation
       this._prepShady();
-      // fast access to property info
-      this._prepPropertyInfo();
     },
 
     _prepBehavior: function(b) {

src/lib/bind/accessors.html

@@ -170,6 +170,8 @@ subject to an additional IP rights grant found at http://polymer.github.io/PATEN
       // ReadOnly properties have a private setter only
       // TODO(kschaaf): Per current Bind factoring, we shouldn't
       // be interrogating the prototype here
+      // TODO(sorvell): we want to avoid using `getPropertyInfo` here, but
+      // this requires more data in `_propertyInfo`
       var info = model.getPropertyInfo && model.getPropertyInfo(property);
       if (info && info.readOnly) {
         // Computed properties are read-only (no property setter), but also don't

src/lib/template/templatizer.html

@@ -116,8 +116,8 @@ subject to an additional IP rights grant found at http://polymer.github.io/PATEN
       archetype._prepEffects();
       this._customPrepEffects(archetype);
       archetype._prepBehaviors();
-      archetype._prepBindings();
       archetype._prepPropertyInfo();
+      archetype._prepBindings();
 
       // boilerplate code
       archetype._notifyPathUp = this._notifyPathUpImpl;

src/micro/properties.html

@@ -105,6 +105,9 @@ subject to an additional IP rights grant found at http://polymer.github.io/PATEN
      * @param {string} property Name of property to introspect.
      * @return {Object} Property descriptor for specified property.
     */
+    // TODO(sorvell): This function returns the first property object found
+    // and this is not the property info Polymer acts on for readOnly or type
+    // This api should be combined with _propertyInfo.
     getPropertyInfo: function(property) {
       var info = this._getPropertyInfo(property, this.properties);
       if (!info) {
@@ -156,8 +159,11 @@ subject to an additional IP rights grant found at http://polymer.github.io/PATEN
             continue;
           }
           if (!target[i]) {
-            target[i] = t = typeof(s) === 'function' ? {type: s} : s;
+            target[i] = {
-            t.attribute = Polymer.CaseMap.camelToDashCase(i);
+              type: typeof(s) === 'function' ? s : s.type,
+              readOnly: s.readOnly,
+              attribute: Polymer.CaseMap.camelToDashCase(i)
+            }
           } else {
             if (!t.type) {
               t.type = s.type;
@@ -165,12 +171,6 @@ subject to an additional IP rights grant found at http://polymer.github.io/PATEN
             if (!t.readOnly) {
               t.readOnly = s.readOnly;
             }
-            if (!t.notify) {
-              t.notify = s.notify;
-            }
-            if (!t.readOnly) {
-              t.readOnly = s.readOnly;
-            }
           }
         }
       }