cros: Allow pin keyboard to keep focus without popping up the pin keyboard.

ui/keyboard/scoped_keyboard_disabler.h

+// Copyright 2016 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_SCOPED_KEYBOARD_DISABLER_H_
+#define UI_KEYBOARD_SCOPED_KEYBOARD_DISABLER_H_
+
+#include "base/macros.h"
+#include "ui/keyboard/keyboard_export.h"
+
+namespace keyboard {
+
+// Saves the force disable keyboard state, and restores the state when going out
+// of scope.
+class KEYBOARD_EXPORT ScopedKeyboardDisabler {
+ public:
+  ScopedKeyboardDisabler();
+  ~ScopedKeyboardDisabler();
+
+  // Blocks the keyboard from showing up. This should only be used for cases
+  // where the focus needs to be passed around without poping up the keyboard.
+  // It needs to be turned off or this object needs to go out of scope when done
+  // with, otherwise the keyboard will not pop up again.
+  void SetForceDisableVirtualKeyboard(bool disable);
+
+  // Return true if keyboard has been blocked from showing up.
+  static bool GetForceDisableVirtualKeyboard();
+
+ private:
+  const bool force_disable_keyboard_state_;
+
+  DISALLOW_COPY_AND_ASSIGN(ScopedKeyboardDisabler);
+};
+
+}  // namespace keyboard
+
+#endif  // UI_KEYBOARD_SCOPED_KEYBOARD_DISABLER_H_