Revert "Rename polymer and cr_elements v0_8 to v1_0"

third_party/polymer/v1_0/components/iron-a11y-keys/iron-a11y-keys.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
-The complete set of authors may be found at http://polymer.github.io/AUTHORS
-The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS
-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
--->
-
-<link rel="import" href="../polymer/polymer.html">
-<link rel="import" href="../iron-a11y-keys-behavior/iron-a11y-keys-behavior.html">
-
-
-<script>
-
-/*
-`iron-a11y-keys` provides a normalized interface for processing keyboard commands that pertain to [WAI-ARIA best
-practices](http://www.w3.org/TR/wai-aria-practices/#kbd_general_binding). The element takes care of browser differences
-with respect to Keyboard events and uses an expressive syntax to filter key presses.
-
-Use the `keys` attribute to express what combination of keys will trigger the event to fire.
-
-Use the `target` attribute to set up event handlers on a specific node.
-The `keys-pressed` event will fire when one of the key combinations set with the `keys` attribute is pressed.
-
-Example:
-
-This element will call `arrowHandler` on all arrow keys:
-
-    <iron-a11y-keys target="{{}}" keys="up down left right" on-keys-pressed="{{arrowHandler}}"></iron-a11y-keys>
-
-Keys Syntax:
-
-The `keys` attribute can accepts a space seprated, `+` concatenated set of modifier keys and some common keyboard keys.
-
-The common keys are `a-z`, `0-9` (top row and number pad), `*` (shift 8 and number pad), `F1-F12`, `Page Up`, `Page
-Down`, `Left Arrow`, `Right Arrow`, `Down Arrow`, `Up Arrow`, `Home`, `End`, `Escape`, `Space`, `Tab`, and `Enter` keys.
-
-The modifier keys are `Shift`, `Control`, and `Alt`.
-
-All keys are expected to be lowercase and shortened:
-`Left Arrow` is `left`, `Page Down` is `pagedown`, `Control` is `ctrl`, `F1` is `f1`, `Escape` is `esc` etc.
-
-Keys Syntax Example:
-
-Given the `keys` attribute value "ctrl+shift+f7 up pagedown esc space alt+m", the `<iron-a11y-keys>` element will send
-the `keys-pressed` event if any of the follow key combos are pressed: Control and Shift and F7 keys, Up Arrow key, Page
-Down key, Escape key, Space key, Alt and M key.
-
-Slider Example:
-
-The following is an example of the set of keys that fulfil the WAI-ARIA "slider" role [best
-practices](http://www.w3.org/TR/wai-aria-practices/#slider):
-
-    <iron-a11y-keys target="{{}}" keys="left pagedown down" on-keys-pressed="{{decrement}}"></iron-a11y-keys>
-    <iron-a11y-keys target="{{}}" keys="right pageup up" on-keys-pressed="{{increment}}"></iron-a11y-keys>
-    <iron-a11y-keys target="{{}}" keys="home" on-keys-pressed="{{setMin}}"></iron-a11y-keys>
-    <iron-a11y-keys target="{{}}" keys="end" on-keys-pressed="{{setMax}}"></iron-a11y-keys>
-
-The `increment` function will move the slider a set amount toward the maximum value.
-The `decrement` function will move the slider a set amount toward the minimum value.
-The `setMin` function will move the slider to the minimum value.
-The `setMax` function will move the slider to the maximum value.
-
-Keys Syntax Grammar:
-
-[EBNF](http://en.wikipedia.org/wiki/Extended_Backus%E2%80%93Naur_Form) Grammar of the `keys` attribute.
-
-    modifier = "shift" | "ctrl" | "alt";
-    ascii = ? /[a-z0-9]/ ? ;
-    fnkey = ? f1 through f12 ? ;
-    arrow = "up" | "down" | "left" | "right" ;
-    key = "tab" | "esc" | "space" | "*" | "pageup" | "pagedown" | "home" | "end" | arrow | ascii | fnkey ;
-    keycombo = { modifier, "+" }, key ;
-    keys = keycombo, { " ", keycombo } ;
-
-@demo demo/index.html
-*/
-
-
-  Polymer({
-    is: 'iron-a11y-keys',
-
-    behaviors: [
-      Polymer.IronA11yKeysBehavior
-    ],
-
-    properties: {
-      target: {
-        type: Object,
-        observer: '_targetChanged'
-      },
-
-      keys: {
-        type: String,
-        reflectToAttribute: true,
-        observer: '_keysChanged'
-      }
-    },
-
-    attached: function() {
-      if (!this.target) {
-        this.target = this.parentNode;
-      }
-    },
-
-    _targetChanged: function(target) {
-      this.keyEventTarget = target;
-    },
-
-    _keysChanged: function() {
-      this.removeOwnKeyBindings();
-      this.addOwnKeyBinding(this.keys, '_fireKeysPressed');
-    },
-
-    _fireKeysPressed: function(event) {
-      this.fire('keys-pressed', event.detail, {});
-    }
-  });
-</script>