Fix auto raw pointer deduction on linux

ui/views/test/ui_controls_factory_desktop_aurax11.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 <X11/keysym.h>
 #include <X11/Xlib.h>
 
 // X macro fail.
 #if defined(RootWindow)
 #undef RootWindow
@@ skipping 128 matching lines @@
     if (screen_position_client) {
       screen_position_client->ConvertPointFromScreen(root_window,
                                                      &root_location);
     }
 
     aura::WindowTreeHost* host = root_window->GetHost();
     gfx::Point root_current_location =
         aura::test::QueryLatestMousePositionRequestInHost(host);
     host->ConvertPixelsToDIP(&root_current_location);
 
-    auto screen = views::test::TestDesktopScreenX11::GetInstance();
+    auto* screen = views::test::TestDesktopScreenX11::GetInstance();
     DCHECK_EQ(screen, display::Screen::GetScreen());
     screen->set_cursor_screen_point(gfx::Point(screen_x, screen_y));
 
     if (root_location != root_current_location && button_down_mask == 0) {
       // Move the cursor because EnterNotify/LeaveNotify are generated with the
       // current mouse position as a result of XGrabPointer()
       root_window->MoveCursorTo(root_location);
     } else {
       XEvent xevent = {0};
       XMotionEvent* xmotion = &xevent.xmotion;
@@ skipping 125 matching lines @@
 
 UIControlsAura* CreateUIControlsDesktopAura() {
   // The constructor of UIControlsDesktopX11 needs X11 connection to be
   // initialized.
   gfx::InitializeThreadedX11();
   return new UIControlsDesktopX11();
 }
 
 }  // namespace test
 }  // namespace views