[MD settings] merge polymer 1.0.11; hack for settings checkbox

third_party/polymer/v1_0/components-chromium/iron-behaviors/iron-button-state-extracted.js

Index: third_party/polymer/v1_0/components-chromium/iron-behaviors/iron-button-state-extracted.js
diff --git a/third_party/polymer/v1_0/components-chromium/iron-behaviors/iron-button-state-extracted.js b/third_party/polymer/v1_0/components-chromium/iron-behaviors/iron-button-state-extracted.js
index f9b7f99b5355b26d0e6606fe3b1dfe80c650061a..ae97f5cd1395f7a827ac5674ba7d2271d9cf1d12 100644
--- a/third_party/polymer/v1_0/components-chromium/iron-behaviors/iron-button-state-extracted.js
+++ b/third_party/polymer/v1_0/components-chromium/iron-behaviors/iron-button-state-extracted.js
@@ -1,6 +1,4 @@
-
-
-  /**
+/**
    * @demo demo/index.html
    * @polymerBehavior Polymer.IronButtonState
    */
@@ -36,8 +34,7 @@
         type: Boolean,
         value: false,
         notify: true,
-        reflectToAttribute: true,
-        observer: '_activeChanged'
+        reflectToAttribute: true
       },
 
       /**
@@ -58,6 +55,16 @@
       receivedFocusFromKeyboard: {
         type: Boolean,
         readOnly: true
+      },
+
+      /**
+       * The aria attribute to be set if the button is a toggle and in the
+       * active state.
+       */
+      ariaActiveAttribute: {
+        type: String,
+        value: 'aria-pressed',
+        observer: '_ariaActiveAttributeChanged'
       }
     },
 
@@ -68,7 +75,8 @@
     },
 
     observers: [
-      '_detectKeyboardFocus(focused)'
+      '_detectKeyboardFocus(focused)',
+      '_activeChanged(active, ariaActiveAttribute)'
     ],
 
     keyBindings: {
@@ -95,8 +103,10 @@
     // to emulate native checkbox, (de-)activations from a user interaction fire
     // 'change' events
     _userActivate: function(active) {
-      this.active = active;
-      this.fire('change');
+      if (this.active !== active) {
+        this.active = active;
+        this.fire('change');
+      }
     },
 
     _eventSourceIsPrimaryInput: function(event) {
@@ -164,11 +174,18 @@
       this._changedButtonState();
     },
 
-    _activeChanged: function(active) {
+    _ariaActiveAttributeChanged: function(value, oldValue) {
+      if (oldValue && oldValue != value && this.hasAttribute(oldValue)) {
+        this.removeAttribute(oldValue);
+      }
+    },
+
+    _activeChanged: function(active, ariaActiveAttribute) {
       if (this.toggles) {
-        this.setAttribute('aria-pressed', active ? 'true' : 'false');
+        this.setAttribute(this.ariaActiveAttribute,
+                          active ? 'true' : 'false');
       } else {
-        this.removeAttribute('aria-pressed');
+        this.removeAttribute(this.ariaActiveAttribute);
       }
       this._changedButtonState();
     },
@@ -195,5 +212,4 @@
   Polymer.IronButtonState = [
     Polymer.IronA11yKeysBehavior,
     Polymer.IronButtonStateImpl
-  ];
-
+  ];