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

ui/keyboard/scoped_keyboard_disabler.cc

+// 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.
+
+#include "ui/keyboard/scoped_keyboard_disabler.h"
+
+namespace keyboard {
+namespace {
+
+bool g_force_disable_keyboard = false;
+
+}
+
+ScopedKeyboardDisabler::ScopedKeyboardDisabler()
+  : force_disable_keyboard_state_(g_force_disable_keyboard) {}
+
+ScopedKeyboardDisabler::~ScopedKeyboardDisabler() {
+  g_force_disable_keyboard = force_disable_keyboard_state_;
+}
+
+void ScopedKeyboardDisabler::SetForceDisableVirtualKeyboard(bool disable) {
+  g_force_disable_keyboard = disable;
+}
+
+// static
+bool ScopedKeyboardDisabler::GetForceDisableVirtualKeyboard() {
+  return g_force_disable_keyboard;
+}
+
+}  // namespace keyboard