Create and show the virtual keyboard.

ui/keyboard/keyboard_controller.h

Index: ui/keyboard/keyboard_controller.h
diff --git a/ui/keyboard/keyboard_controller.h b/ui/keyboard/keyboard_controller.h
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+// Copyright (c) 2013 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.
+
+#ifndef UI_KEYBOARD_KEYBOARD_CONTROLLER_H_
+#define UI_KEYBOARD_KEYBOARD_CONTROLLER_H_
+
+#include "base/basictypes.h"
+#include "base/memory/scoped_ptr.h"
+#include "ui/keyboard/keyboard_export.h"
+
+namespace aura {
+class Window;
+}
+
+namespace keyboard {
+
+class KeyboardControllerProxy;
+
+// Provides control of the virtual keyboard, including providing a container,
+// managing object lifetimes and controlling visibility.
+class KEYBOARD_EXPORT KeyboardController {
+ public:
+  // Takes ownership of |proxy|.
+  explicit KeyboardController(KeyboardControllerProxy* proxy);
+  virtual ~KeyboardController();
+
+  // Returns the container for the keyboard, which is then owned by the caller.
+  // It is the responsibility of the caller to Show() the returned window.
+  aura::Window* GetContainerWindow();
+
+ private:
+  scoped_ptr<KeyboardControllerProxy> proxy_;
+  aura::Window* container_;
+
+  DISALLOW_COPY_AND_ASSIGN(KeyboardController);
+};
+
+}  // namespace keyboard
+
+#endif  // UI_KEYBOARD_KEYBOARD_CONTROLLER_H_