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

ash/display/mirror_window_controller.cc

 // Copyright (c) 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 "ash/display/mirror_window_controller.h"
 
 #if defined(USE_X11)
 #include <X11/Xlib.h>
 
 // Xlib.h defines RootWindow.
@@ skipping 16 matching lines @@
 #include "ui/base/cursor/cursors_aura.h"
 #include "ui/base/hit_test.h"
 #include "ui/base/layout.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/compositor/reflector.h"
 #include "ui/gfx/canvas.h"
 #include "ui/gfx/image/image_skia.h"
 #include "ui/gfx/image/image_skia_operations.h"
 #include "ui/gfx/native_widget_types.h"
 
+#if defined(USE_X11)
+#include "ui/base/x/x11_util.h"
+#endif
+
 namespace ash {
 namespace internal {
 namespace {
 
 #if defined(USE_X11)
 // Mirror window shouldn't handle input events.
 void DisableInput(XID window) {
   long event_mask = ExposureMask | VisibilityChangeMask |
       StructureNotifyMask | PropertyChangeMask;
-  XSelectInput(base::MessagePumpX11::GetDefaultXDisplay(),
+  XSelectInput(ui::GetXDisplay(),
                window, event_mask);

[oshima, 2013/09/17 15:05:10]

can you make this single line?

[sadrul, 2013/09/17 15:28:44]

Done.

 }
 #endif
 
 class NoneCaptureClient : public aura::client::CaptureClient {
  public:
   NoneCaptureClient() {}
   virtual ~NoneCaptureClient() {}
 
  private:
   // Does a capture on the |window|.
@@ skipping 275 matching lines @@
       Shell::GetScreen()->GetPrimaryDisplay().id());
   DCHECK(display_manager->mirrored_display().is_valid());
   return scoped_ptr<aura::RootWindowTransformer>(
       internal::CreateRootWindowTransformerForMirroredDisplay(
           source_display_info,
           mirror_display_info));
 }
 
 }  // namespace internal
 }  // namespace ash