[third_party] add polymer 1.2.3

polymer_1.2.3/bower_components/iron-behaviors/iron-control-state.html

 <!--
 @license
 Copyright (c) 2015 The Polymer Project Authors. All rights reserved.
 This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
 The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
 The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
 Code distributed by Google as part of the polymer project is also
 subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
 -->
 
@@ skipping 42 matching lines @@
         }
       }
 
     },
 
     observers: [
       '_changedControlState(focused, disabled)'
     ],
 
     ready: function() {
-      // TODO(sjmiles): ensure read-only property is valued so the compound
-      // observer will fire
-      if (this.focused === undefined) {
-        this._setFocused(false);
-      }
       this.addEventListener('focus', this._boundFocusBlurHandler, true);
       this.addEventListener('blur', this._boundFocusBlurHandler, true);
     },
 
     _focusBlurHandler: function(event) {
-      var target = event.path ? event.path[0] : event.target;
-      if (target === this) {
-        var focused = event.type === 'focus';
-        this._setFocused(focused);
-      } else if (!this.shadowRoot) {
-        event.stopPropagation();
+      // NOTE(cdata):  if we are in ShadowDOM land, `event.target` will
+      // eventually become `this` due to retargeting; if we are not in
+      // ShadowDOM land, `event.target` will eventually become `this` due
+      // to the second conditional which fires a synthetic event (that is also
+      // handled). In either case, we can disregard `event.path`.
+
+      if (event.target === this) {
+        this._setFocused(event.type === 'focus');
+      } else if (!this.shadowRoot && !this.isLightDescendant(event.target)) {
         this.fire(event.type, {sourceEvent: event}, {
           node: this,
           bubbles: event.bubbles,
           cancelable: event.cancelable
         });
       }
     },
 
     _disabledChanged: function(disabled, old) {
       this.setAttribute('aria-disabled', disabled ? 'true' : 'false');
@@ skipping 10 matching lines @@
     _changedControlState: function() {
       // _controlStateChanged is abstract, follow-on behaviors may implement it
       if (this._controlStateChanged) {
         this._controlStateChanged();
       }
     }
 
   };
 
 </script>