Use 41% of screen height as all system VK height

ui/keyboard/resources/main.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.
 (function(exports) {
   /**
    * Alignment options for a keyset.
    * @param {Object=} opt_keyset The keyset to calculate the dimensions for.
    *    Defaults to the current active keyset.
    */
   var AlignmentOptions = function(opt_keyset) {
@@ skipping 187 matching lines @@
       else
         return binarySearch_(array, mid + 1, end, testFn);
   }
 
   /**
    * Calculate width and height of the window.
    * @private
    * @return {Array.<String, number>} The bounds of the keyboard container.
    */
   function getKeyboardBounds_() {
-    var keyboard = $('keyboard');
-    var ratio = DEFAULT_KEYBOARD_ASPECT_RATIO;
-    if (keyboard.config && keyboard.config.a11ymode) {
-      ratio = DEFAULT_A11Y_KEYBOARD_ASPECT_RATIO;
-    }
     return {
       "width": screen.width,
-      "height": screen.height * ratio
+      "height": screen.height * DEFAULT_KEYBOARD_ASPECT_RATIO
     };
   }
 
   /**
    * Calculates the desired key aspect ratio based on screen size.
    * @return {number} The aspect ratio to use.
    */
   function getKeyAspectRatio() {
     return (screen.width > screen.height) ?
         KEY_ASPECT_RATIO_LANDSCAPE : KEY_ASPECT_RATIO_PORTRAIT;
@@ skipping 406 matching lines @@
 addEventListener('touchend', function(e) { e.preventDefault() });
 addEventListener('touchmove', function(e) { e.preventDefault() });
 addEventListener('polymer-ready', function(e) {
   flattenKeysets();
   resolveAudio();
 });
 addEventListener('stateChange', function(e) {
   if (e.detail.value == $('keyboard').activeKeysetId)
     realignAll();
 })