WebUI: Roll iron-a11y-keys 1.0.6->1.0.7

third_party/polymer/v1_0/components-chromium/iron-a11y-keys/iron-a11y-keys-extracted.js

 /**
 `iron-a11y-keys` provides a cross-browser interface for processing
 keyboard commands. The interface adheres to [WAI-ARIA best
 practices](http://www.w3.org/TR/wai-aria-practices/#kbd_general_binding).
 It uses an expressive syntax to filter key presses.
 
 ## Basic usage
 
 The sample code below is a portion of a custom element. The goal is to call
 the `onEnter` method whenever the `paper-input` element is in focus and
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 The following is an example of the set of keys that fulfills WAI-ARIA's
 "slider" role [best
 practices](http://www.w3.org/TR/wai-aria-practices/#slider):
 
     <iron-a11y-keys target="[[target]]" keys="left pagedown down"
                     on-keys-pressed="decrement"></iron-a11y-keys>
     <iron-a11y-keys target="[[target]]" keys="right pageup up"
                     on-keys-pressed="increment"></iron-a11y-keys>
     <iron-a11y-keys target="[[target]]" keys="home"
                     on-keys-pressed="setMin"></iron-a11y-keys>
-    <iron-a11y-keys target=""[[target]] keys="end"
+    <iron-a11y-keys target="[[target]]" keys="end"
                     on-keys-pressed="setMax"></iron-a11y-keys>
 
 The `target` properties must evaluate to a node. See the basic usage
 example above.
 
 Each of the values for the `on-keys-pressed` attributes must evalute
 to methods. The `increment` method should move the slider a set amount
 toward the maximum value. `decrement` should move the slider a set amount
 toward the minimum value. `setMin` should move the slider to the minimum
 value. `setMax` should move the slider to the maximum value.
@@ skipping 36 matching lines @@
 
     _keysChanged: function() {
       this.removeOwnKeyBindings();
       this.addOwnKeyBinding(this.keys, '_fireKeysPressed');
     },
 
     _fireKeysPressed: function(event) {
       this.fire('keys-pressed', event.detail, {});
     }
   });