Add a virtual keyboard webui at chrome://keyboard/

chrome/browser/ui/webui/chrome_web_ui_controller_factory.cc

Index: chrome/browser/ui/webui/chrome_web_ui_controller_factory.cc
diff --git a/chrome/browser/ui/webui/chrome_web_ui_controller_factory.cc b/chrome/browser/ui/webui/chrome_web_ui_controller_factory.cc
index 40a1b996f5cf2a1b5bbd0c015f7743c923d9a13b..0b054c67f57516aa28ea953c849d475a67c6ddb4 100644
--- a/chrome/browser/ui/webui/chrome_web_ui_controller_factory.cc
+++ b/chrome/browser/ui/webui/chrome_web_ui_controller_factory.cc
@@ -98,6 +98,8 @@
 
 #if defined(USE_AURA)
 #include "chrome/browser/ui/webui/gesture_config_ui.h"
+#include "ui/keyboard/keyboard_constants.h"
+#include "ui/keyboard/keyboard_ui_controller.h"
 #endif
 
 #if !defined(OS_CHROMEOS) && !defined(OS_ANDROID)
@@ -357,6 +359,8 @@ WebUIFactoryFunction GetWebUIFactoryFunction(WebUI* web_ui,
 #if defined(USE_AURA)
   if (url.host() == chrome::kChromeUIGestureConfigHost)
     return &NewWebUI<GestureConfigUI>;
+  if (url.host() == keyboard::kKeyboardWebUIHost)
+    return &NewWebUI<keyboard::KeyboardUIController>;
 #endif
 
 #if !defined(OS_CHROMEOS) && !defined(OS_ANDROID)