Remove third_party/polymer from .gitignore

third_party/polymer/v1_0/components/paper-radio-button/paper-radio-button.html

-<!--
-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
--->
-
-<link rel="import" href="../polymer/polymer.html">
-<link rel="import" href="../paper-ripple/paper-ripple.html">
-<link rel="import" href="../paper-styles/default-theme.html">
-<link rel="import" href="../paper-behaviors/paper-inky-focus-behavior.html">
-
-<!--
-`paper-radio-button` is a button that can be either checked or unchecked.
-User can tap the radio button to check or uncheck it.
-
-Use a `<paper-radio-group>` to group a set of radio buttons.  When radio buttons
-are inside a radio group, exactly one radio button in the group can be checked
-at any time.
-
-Example:
-
-    <paper-radio-button></paper-radio-button>
-    <paper-radio-button>Item label</paper-radio-button>
-
-### Styling
-
-The following custom properties and mixins are available for styling:
-
-Custom property | Description | Default
-----------------|-------------|----------
-`--paper-radio-button-unchecked-background-color` | Radio button background color when the input is not checked | `transparent`
-`--paper-radio-button-unchecked-color` | Radio button color when the input is not checked | `--primary-text-color`
-`--paper-radio-button-unchecked-ink-color` | Selected/focus ripple color when the input is not checked | `--primary-text-color`
-`--paper-radio-button-checked-color` | Radio button color when the input is checked | `--default-primary-color`
-`--paper-radio-button-checked-ink-color` | Selected/focus ripple color when the input is checked | `--default-primary-color`
-`--paper-radio-button-label-color` | Label color | `--primary-text-color`
-
-@group Paper Elements
-@element paper-radio-button
-@hero hero.svg
-@demo demo/index.html
--->
-
-<dom-module id="paper-radio-button">
-
-  <link rel="import" type="css" href="paper-radio-button.css">
-
-  <template>
-
-    <div id="radioContainer">
-      <div id="offRadio"></div>
-      <div id="onRadio"></div>
-      <paper-ripple id="ink" class="circle" center checked$="[[checked]]"></paper-ripple>
-    </div>
-
-    <div id="radioLabel" aria-hidden="true"><content></content></div>
-
-  </template>
-
-  <script>
-    Polymer({
-      is: 'paper-radio-button',
-
-      behaviors: [
-        Polymer.PaperInkyFocusBehavior
-      ],
-
-      hostAttributes: {
-        role: 'radio',
-        'aria-checked': false,
-        tabindex: 0
-      },
-
-      properties: {
-        /**
-         * Fired when the checked state changes due to user interaction.
-         *
-         * @event change
-         */
-
-        /**
-         * Fired when the checked state changes.
-         *
-         * @event iron-change
-         */
-
-        /**
-         * Gets or sets the state, `true` is checked and `false` is unchecked.
-         */
-        checked: {
-          type: Boolean,
-          value: false,
-          reflectToAttribute: true,
-          notify: true,
-          observer: '_checkedChanged'
-        },
-
-        /**
-         * If true, the button toggles the active state with each tap or press
-         * of the spacebar.
-         */
-        toggles: {
-          type: Boolean,
-          value: true,
-          reflectToAttribute: true
-        }
-      },
-
-      ready: function() {
-        if (Polymer.dom(this).textContent == '') {
-          this.$.radioLabel.hidden = true;
-        } else {
-          this.setAttribute('aria-label', Polymer.dom(this).textContent);
-        }
-        this._isReady = true;
-      },
-
-      _buttonStateChanged: function() {
-        if (this.disabled) {
-          return;
-        }
-        if (this._isReady) {
-          this.checked = this.active;
-        }
-      },
-
-      _checkedChanged: function() {
-        this.setAttribute('aria-checked', this.checked ? 'true' : 'false');
-        this.active = this.checked;
-        this.fire('iron-change');
-      }
-    })
-  </script>
-
-</dom-module>