X11: Add TestDesktopScreenX11 to simulate mouse movement in ui tests

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
 #endif
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/macros.h"
 #include "ui/aura/client/screen_position_client.h"
 #include "ui/aura/env.h"
 #include "ui/aura/test/aura_test_utils.h"
 #include "ui/aura/test/ui_controls_factory_aura.h"
 #include "ui/aura/test/x11_event_sender.h"
 #include "ui/aura/window_event_dispatcher.h"
 #include "ui/base/test/ui_controls_aura.h"
 #include "ui/base/x/x11_util.h"
 #include "ui/compositor/dip_util.h"
 #include "ui/events/keycodes/keyboard_code_conversion_x.h"
 #include "ui/events/test/platform_event_waiter.h"
 #include "ui/gfx/x/x11_connection.h"
+#include "ui/views/test/test_desktop_screen_x11.h"
 #include "ui/views/widget/desktop_aura/desktop_window_tree_host_x11.h"
 
 namespace views {
 namespace test {
 namespace {
 
 using ui_controls::DOWN;
 using ui_controls::LEFT;
 using ui_controls::MIDDLE;
 using ui_controls::MouseButton;
@@ skipping 100 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->ConvertPointFromHost(&root_current_location);
 
+    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;
       xmotion->type = MotionNotify;
       xmotion->x = root_location.x();
       xmotion->y = root_location.y();
@@ skipping 122 matching lines @@
 
 UIControlsAura* CreateUIControlsDesktopAura() {
   // The constructor of UIControlsDesktopX11 needs X11 connection to be
   // initialized.
   gfx::InitializeThreadedX11();
   return new UIControlsDesktopX11();
 }
 
 }  // namespace test
 }  // namespace views