initial version of auto VK switching.

chrome/browser/resources/keyboard/main.js

Index: chrome/browser/resources/keyboard/main.js
diff --git a/chrome/browser/resources/keyboard/main.js b/chrome/browser/resources/keyboard/main.js
index 4560e9fed3511eab3addbe3fc4e19719cb1cda0c..1f7e5d5b9903a37d8db2771534a0b6590a699f62 100644
--- a/chrome/browser/resources/keyboard/main.js
+++ b/chrome/browser/resources/keyboard/main.js
@@ -559,7 +559,7 @@ var KEYS = [
     // 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()
@@ -698,3 +698,15 @@ window.onload = function() {
 }
 // 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.
+}