x11: Prefer using ui::GetXDisplay() over getting the Display from the X11 message-pump.

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>
@@ skipping 96 matching lines @@
 }  // namespace
 
 ////////////////////////////////////////////////////////////////////////////////
 // DesktopRootWindowHostX11, public:
 
 DesktopRootWindowHostX11::DesktopRootWindowHostX11(
     internal::NativeWidgetDelegate* native_widget_delegate,
     DesktopNativeWidgetAura* desktop_native_widget_aura,
     const gfx::Rect& initial_bounds)
     : close_widget_factory_(this),
-      xdisplay_(base::MessagePumpX11::GetDefaultXDisplay()),
+      xdisplay_(ui::GetXDisplay()),
       xwindow_(0),
       x_root_window_(DefaultRootWindow(xdisplay_)),
       atom_cache_(xdisplay_, kAtomsToCache),
       window_mapped_(false),
       focus_when_shown_(false),
       is_fullscreen_(false),
       current_cursor_(ui::kCursorNull),
       native_widget_delegate_(native_widget_delegate),
       desktop_native_widget_aura_(desktop_native_widget_aura) {
 }
@@ skipping 1231 matching lines @@
   if (linux_ui) {
     ui::NativeTheme* native_theme = linux_ui->GetNativeTheme();
     if (native_theme)
       return native_theme;
   }
 
   return ui::NativeTheme::instance();
 }
 
 }  // namespace views