initial version of auto VK switching.

chrome/browser/resources/keyboard/main.js

 // Copyright (c) 2011 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.
 
 /**
  * @fileoverview A simple, English virtual keyboard implementation.
  */
 
 var KEY_MODE = 'key';
 var SHIFT_MODE = 'shift';
@@ skipping 541 matching lines @@
     new Key(C('/'), C('/'), C('\\'), C(' ')),
     new ShiftKey(1)
   ],
   [
     new SvgKey(1.3, 'mic', ''),
     new DotComKey(),
     new SpecialKey(1.3, '@', '@'),
     // TODO(bryeung): the spacebar needs to be a little bit more stretchy,
     // since this row has only 7 keys (as opposed to 12), the truncation
     // can cause it to not be wide enough.
-    new SpecialKey(4.8, ' ', 'Spacebar'),
+    new SpecialKey(4.8, 'US', 'Spacebar'),
     new SpecialKey(1.3, ',', ','),
     new SpecialKey(1.3, '.', '.'),
     new HideKeyboardKey()
   ]
 ];
 
 /**
  * All of the rows in the keyboard.
  * @type {Array.<Row>}
  */
@@ skipping 118 matching lines @@
   // Ref: dvcs.w3.org/hg/webperf/raw-file/tip/specs/PageVisibility/Overview.html
   document.addEventListener("webkitvisibilitychange", function() {
     if (document.webkitHidden) {
       currentMode = KEY_MODE;
       setMode(currentMode);
     }
   }, false);
 }
 // TODO(bryeung): would be nice to leave less gutter (without causing
 // rendering issues with floated divs wrapping at some sizes).
+
+/**
+ * Switch the keyboard layout e.g. to US-Dvorak.
+ * @return {void}
+ */
+window.onhashchange = function() {
+  var layout = location.hash.replace(/^#/, "").toUpperCase();
+  MODES.forEach(function(e) {
+      allRows[3].keys_[3].modeElements_[e].textContent = layout;
+    });
+  // TODO(mazda): Switch the keyboard layout using the layout value.
+}