[gtk+] broadway: Stop using gdk_display_get_root_window

[Matthias Clasen <matthiasc src gnome org>]

commit a163d5b7a7ce3af8e5220097837fd433a8d7970b
Author: Matthias Clasen <mclasen redhat com>
Date:   Sun Nov 5 19:37:54 2017 -0500

    broadway: Stop using gdk_display_get_root_window
    
    We can just use the field in the display.

 gdk/broadway/gdkdevice-broadway.c |    8 ++++++--
 gdk/broadway/gdkeventsource.c     |    2 +-
 2 files changed, 7 insertions(+), 3 deletions(-)
---
diff --git a/gdk/broadway/gdkdevice-broadway.c b/gdk/broadway/gdkdevice-broadway.c
index 994309e..a8575af 100644
--- a/gdk/broadway/gdkdevice-broadway.c
+++ b/gdk/broadway/gdkdevice-broadway.c
@@ -182,7 +182,7 @@ gdk_broadway_device_query_state (GdkDevice        *device,
       GdkWindow *mouse_toplevel;
 
       if (window == NULL)
-        window = gdk_display_get_root_window (gdk_device_get_display (device));
+        window = broadway_display->root_window;
 
       impl = GDK_WINDOW_IMPL_BROADWAY (window->impl);
       toplevel = impl->wrapper;
@@ -333,10 +333,14 @@ gdk_broadway_device_window_at_position (GdkDevice       *device,
                                        GdkModifierType *mask,
                                        gboolean         get_toplevel)
 {
+  GdkDisplay *display;
+  GdkBroadwayDisplay *broadway_display;
   GdkWindow *root_window;
   GdkWindow *window;
 
-  root_window = gdk_display_get_root_window (gdk_device_get_display (device));
+  display = gdk_device_get_display (device);
+  broadway_display = GDK_BROADWAY_DISPLAY (display);
+  root_window = broadway_display->root_window;
 
   gdk_broadway_device_query_state (device, root_window, &window, NULL, NULL, win_x, win_y, mask);
 
diff --git a/gdk/broadway/gdkeventsource.c b/gdk/broadway/gdkeventsource.c
index c230c9a..268bd65 100644
--- a/gdk/broadway/gdkeventsource.c
+++ b/gdk/broadway/gdkeventsource.c
@@ -349,7 +349,7 @@ _gdk_broadway_events_got_input (BroadwayInputMsg *message)
     break;
 
   case BROADWAY_EVENT_SCREEN_SIZE_CHANGED:
-    window = gdk_display_get_root_window (display);
+    window = display_broadway->root_window;
     window->width = message->screen_resize_notify.width;
     window->height = message->screen_resize_notify.height;
     _gdk_window_update_size (window);