Fix X11DesktopHandler::ActivateWindow on Unity for known user gestures

ui/base/base_window.cc

 // Copyright 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.
 
 #include "ui/base/base_window.h"
 
 namespace ui {
 
 bool BaseWindow::IsRestored(const BaseWindow& window) {
   return !window.IsMaximized() &&
      !window.IsMinimized() &&
      !window.IsFullscreen();
 }
 
+void BaseWindow::ShowForUserGesture() {
+  Show();
+}
+
+void BaseWindow::ActivateForUserGesture() {
+  Activate();
+}
+
 }  // namespace ui