Create and show the virtual keyboard.

ash/shell_delegate.h

Index: ash/shell_delegate.h
diff --git a/ash/shell_delegate.h b/ash/shell_delegate.h
index 530291dac907eaa9121125a78e656048f68c8d79..97c095287005460ad3248d4ebfbd7e9eebabe231 100644
--- a/ash/shell_delegate.h
+++ b/ash/shell_delegate.h
@@ -34,6 +34,10 @@ namespace views {
 class Widget;
 }
 
+namespace keyboard {
+class KeyboardControllerProxy;
+}
+
 namespace ash {
 
 class CapsLockDelegate;
@@ -154,6 +158,10 @@ class ASH_EXPORT ShellDelegate {
   // Shows the keyboard shortcut overlay.
   virtual void ShowKeyboardOverlay() = 0;
 
+  // Create a shell-specific keyboard::KeyboardControllerProxy
+  virtual keyboard::KeyboardControllerProxy*
+      CreateKeyboardControllerProxy() = 0;
+
   // Shows the task manager window.
   virtual void ShowTaskManager() = 0;