Remove dead code for system VK.

ui/keyboard/resources/elements/kb-key.js

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-Polymer('kb-key', {
-  /**
-   * The background image to display on this key. Does not display an
-   * image if this is the empty string.
-   * @type {string}
-   */
-  image: "",
-
-  /**
-   * The background image size to use if an image is specified. The size
-   * is provided as a string, for example, "50%".
-   * @type {string}
-   */
-  imageSize: "",
-
-  /**
-   * Key codes have been deprecated in DOM3 key events, but are required
-   * for legacy web content. The key codes depend on the position of the
-   * key on the keyboard and is independent of which modifier keys (shift,
-   *  alt, ...) are active.
-   * @type {number|undefined}
-   */
-  keyCode: undefined,
-
-  /**
-   * Name of the key as defined in the DOM3 specification for key events.
-   * Like the keyCode, the keyName is independent of the state of the
-   * modifier keys.
-   * @type {string|undefined}
-   */
-  keyName: undefined,
-
-  /**
-   * Whether the shift key is pressed when producing the key value.
-   * @type {boolean}
-   */
-  shiftModifier: false,
-
-  /**
-   * The sound to play when this key is pressed.
-   * @type {Sound}
-   */
-  sound: Sound.DEFAULT,
-
-  /**
-   * Whether the key can be stretched to accomodate pixel rounding errors.
-   */
-  stretch: false,
-
-  /**
-   * Weighting to use for layout in order to properly size the key.
-   * Keys with a high weighting are wider than normal keys.
-   * @type {number}
-   */
-  weight: DEFAULT_KEY_WEIGHT,
-
-  /**
-   * Called when the image attribute changes. This is used to set the
-   * background image of the key.
-   * TODO(rsadam): Remove when polymer {{}} syntax regression is fixed.
-   */
-  imageChanged: function() {
-    if (!this.image) {
-      this.$.key.style.backgroundImage = "none";
-    } else {
-      // If no extension provided, default to svg.
-      var image =
-          this.image.split('.').length > 1 ? this.image : this.image + ".svg";
-      this.$.key.style.backgroundImage =
-          "url(images/" + image + ")";
-    }
-  },
-
-  /**
-   * Returns a subset of the key attributes.
-   * @param {string} caller The id of the function that called
-   *     populateDetails.
-   * @return {Object} Mapping of attributes for the key element.
-   */
-  populateDetails: function(caller) {
-    var details = this.super([caller]);
-    details.keyCode = this.keyCode;
-    details.keyName = this.keyName;
-    details.shiftModifier = this.shiftModifier;
-    details.sound = this.sound;
-    return details;
-  },
-});
-;
-
-Polymer('kb-abc-key', {
-  populateDetails: function(caller) {
-    var detail = this.super([caller]);
-    switch (caller) {
-      case ('down'):
-        detail.relegateToShift = true;
-        break;
-      default:
-        break;
-    }
-    return detail;
-  }
-});
-;
-
-Polymer('kb-hide-keyboard-key', {
-  up: function(event) {
-    hideKeyboard();
-  },
-});