update elements and fix some bugs

lib/paper_icon_button.dart

 // DO NOT EDIT: auto-generated with `pub run custom_element_apigen:update`
 
 /// Dart API for the polymer element `paper_icon_button`.
 @HtmlImport('paper_icon_button_nodart.html')
 library polymer_elements.lib.src.paper_icon_button.paper_icon_button;
 
 import 'dart:html';
 import 'dart:js' show JsArray, JsObject;
 import 'package:web_components/web_components.dart';
 import 'package:polymer_interop/polymer_interop.dart';
 import 'paper_inky_focus_behavior.dart';
 import 'iron_button_state.dart';
 import 'iron_a11y_keys_behavior.dart';
 import 'iron_control_state.dart';
+import 'paper_ripple_behavior.dart';
 import 'iron_icon.dart';
 import 'iron_flex_layout.dart';
 import 'default_theme.dart';
 import 'paper_button_behavior.dart';
 import 'paper_ripple.dart';
 
-/// Material Design: <a href="http://www.google.com/design/spec/components/buttons.html">Buttons</a>
+/// Material design: [Icon toggles](https://www.google.com/design/spec/components/buttons.html#buttons-toggle-buttons)
 ///
 /// `paper-icon-button` is a button with an image placed at the center. When the user touches
 /// the button, a ripple effect emanates from the center of the button.
 ///
 /// `paper-icon-button` includes a default icon set.  Use `icon` to specify which icon
 /// from the icon set to use.
 ///
 ///     <paper-icon-button icon="menu"></paper-icon-button>
 ///
 /// See [`iron-iconset`](#iron-iconset) for more information about
 /// how to use a custom icon set.
 ///
 /// Example:
 ///
 ///     <link href="path/to/iron-icons/iron-icons.html" rel="import">
 ///
 ///     <paper-icon-button icon="favorite"></paper-icon-button>
 ///     <paper-icon-button src="star.png"></paper-icon-button>
 ///
-/// ###Styling
+/// ### Styling
 ///
 /// Style the button with CSS as you would a normal DOM element. If you are using the icons
 /// provided by `iron-icons`, they will inherit the foreground color of the button.
 ///
 ///     /* make a red "favorite" button */
 ///     <paper-icon-button icon="favorite" style="color: red;"></paper-icon-button>
 ///
 /// By default, the ripple is the same color as the foreground at 25% opacity. You may
-/// customize the color using this selector:
-///
-///     /* make #my-button use a blue ripple instead of foreground color */
-///     #my-button::shadow #ripple {
-///       color: blue;
-///     }
-///
-/// The opacity of the ripple is not customizable via CSS.
+/// customize the color using the `--paper-icon-button-ink-color` custom property.
 ///
 /// The following custom properties and mixins are available for styling:
 ///
 /// Custom property | Description | Default
 /// ----------------|-------------|----------
-/// `--paper-icon-button-disabled-text` | The color of the disabled button | `--primary-text-color`
-/// `--paper-icon-button-ink-color` | Selected/focus ripple color | `--default-primary-color`
+/// `--paper-icon-button-disabled-text` | The color of the disabled button | `--disabled-text-color`
+/// `--paper-icon-button-ink-color` | Selected/focus ripple color | `--primary-text-color`
 /// `--paper-icon-button` | Mixin for a button | `{}`
 /// `--paper-icon-button-disabled` | Mixin for a disabled button | `{}`
 @CustomElementProxy('paper-icon-button')
-class PaperIconButton extends HtmlElement with CustomElementProxyMixin, PolymerBase, IronA11yKeysBehavior, IronButtonState, IronControlState, PaperInkyFocusBehavior {
+class PaperIconButton extends HtmlElement with CustomElementProxyMixin, PolymerBase, IronA11yKeysBehavior, IronButtonState, IronControlState, PaperRippleBehavior, PaperInkyFocusBehavior {
   PaperIconButton.created() : super.created();
   factory PaperIconButton() => new Element.tag('paper-icon-button');
 
   /// Specifies the alternate text for the button, for accessibility.
   String get alt => jsElement[r'alt'];
   set alt(String value) { jsElement[r'alt'] = value; }
 
   /// Specifies the icon name or index in the set of icons available in
   /// the icon's icon set. If the icon property is specified,
   /// the src property should not be.
   String get icon => jsElement[r'icon'];
   set icon(String value) { jsElement[r'icon'] = value; }
 
   /// The URL of an image for the icon. If the src property is specified,
   /// the icon property should not be.
   String get src => jsElement[r'src'];
   set src(String value) { jsElement[r'src'] = value; }
 }