Remove dead code for system VK.

ui/keyboard/resources/elements/kb-keyset.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-keyset', {
-  align: "center",
-  // Propagate flick gestures to keys in this keyset.
-  flick: true,
-  isDefault: false,
-  nextKeyset: undefined,
-  // Weight offsets for positioning the keyset.
-  weightBottom: 15,
-  weightLeft: 10,
-  weightRight: 10,
-  weightTop: 6,
-
-  /**
-   * Weight assigned to space between keys, of the form "xPitch yPitch".
-   * Defaults to xPitch = yPitch if it's only a single number.
-   * @type {string}
-   */
-  pitch: "10",
-
-  /**
-   * Expands kb-key-sequences into individual keys.
-   */
-  flattenKeyset: function() {
-    var keySequences = this.querySelectorAll('kb-key-sequence');
-    if (keySequences.length != 0) {
-      keySequences.array().forEach(function(element) {
-        var generatedDom = element.generateDom();
-        element.parentNode.replaceChild(generatedDom, element);
-      });
-    }
-  },
-
-  // TODO(bshe): support select keyset on down, long and dbl events.
-  keyUp: function(event, detail) {
-    switch (detail.char) {
-      case 'Shift':
-      case 'Alt':
-      case 'Ctrl':
-      case 'Invalid':
-        return;
-      default:
-        break;
-    }
-    if (!detail.toKeyset)
-      detail.toKeyset = this.nextKeyset;
-  },
-  keyLongpress: function(event, detail) {
-    if (!detail.char)
-      return;
-
-    var altkeyContainer = this.$.altkeyContainer.getDistributedNodes()[0];
-    if (!altkeyContainer)
-      return;
-
-    var altkeyMetadata = this.$.altkeyMetadata;
-    var altkeys = altkeyMetadata.getAltkeys(detail.char,
-                                            !!detail.hintText);
-    if (!altkeys)
-      return;
-
-    var id = altkeys.id;
-    var activeAltKeySet = altkeyContainer.querySelector('#' + id);
-    if (!activeAltKeySet) {
-      var keyWidth = event.target.clientWidth;
-      var leftMargin = event.target.offsetLeft;
-      var maxLeftOffset = Math.round(leftMargin / keyWidth);
-      var rightMargin = this.clientWidth - leftMargin - keyWidth;
-      var maxRightOffset = Math.round(rightMargin / keyWidth);
-      activeAltKeySet = altkeyMetadata.createAltkeySet(detail.char,
-                                                       maxLeftOffset,
-                                                       maxRightOffset,
-                                                       detail.hintText);
-      altkeyContainer.appendChild(activeAltKeySet);
-    }
-
-    altkeyContainer.keyset = id;
-    event.target.dropKey();
-    activeAltKeySet.style.width = event.target.clientWidth *
-        activeAltKeySet.childElementCount + 'px';
-    activeAltKeySet.style.height = event.target.clientHeight + 'px';
-    activeAltKeySet.style.top = event.target.offsetTop + 'px';
-    var leftOffset = activeAltKeySet.offset * event.target.clientWidth;
-    activeAltKeySet.style.left = event.target.offsetLeft - leftOffset +
-        'px';
-    var nodes = activeAltKeySet.childNodes;
-    nodes[activeAltKeySet.offset].classList.add('active');
-    altkeyContainer.hidden = false;
-  },
-
-  show: function() {
-    var old = $('keyboard').querySelector('.activeKeyset');
-    if (old && old != this)
-      old.classList.remove('activeKeyset');
-    this.classList.add('activeKeyset');
-    this.fire('stateChange', {
-      state: 'keysetChanged',
-      value: this.id
-    });
-  },
-});