Attempt to re-land FocusManager removal from Aura.

ui/views/widget/desktop_aura/desktop_root_window_host_x11.cc

 // Copyright (c) 2012 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/views/widget/desktop_aura/desktop_root_window_host_x11.h"
 
 #include <X11/extensions/shape.h>
 #include <X11/extensions/XInput2.h>
 #include <X11/Xatom.h>
 #include <X11/Xregion.h>
 #include <X11/Xutil.h>
 
 #include "base/basictypes.h"
 #include "base/message_loop/message_pump_x11.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
 #include "third_party/skia/include/core/SkPath.h"
 #include "ui/aura/client/screen_position_client.h"
 #include "ui/aura/client/user_action_client.h"
-#include "ui/aura/focus_manager.h"
 #include "ui/aura/root_window.h"
 #include "ui/aura/window_property.h"
 #include "ui/base/dragdrop/os_exchange_data_provider_aurax11.h"
 #include "ui/base/x/x11_util.h"
 #include "ui/events/event_utils.h"
 #include "ui/events/x/device_data_manager.h"
 #include "ui/events/x/touch_factory_x11.h"
 #include "ui/gfx/insets.h"
 #include "ui/gfx/path.h"
 #include "ui/gfx/path_x11.h"
@@ skipping 1393 matching lines @@
   if (linux_ui) {
     ui::NativeTheme* native_theme = linux_ui->GetNativeTheme();
     if (native_theme)
       return native_theme;
   }
 
   return ui::NativeTheme::instance();
 }
 
 }  // namespace views