Fix another painting regression caused by my patch to address painting problems with the fullscreen…

ui/views/widget/desktop_aura/desktop_window_tree_host_win.cc

Index: ui/views/widget/desktop_aura/desktop_window_tree_host_win.cc
diff --git a/ui/views/widget/desktop_aura/desktop_window_tree_host_win.cc b/ui/views/widget/desktop_aura/desktop_window_tree_host_win.cc
index 05323aae776e4e08a06e9acbd9865628527f89a9..fa9ea48b50071c9c5110abc17c1fd37933594683 100644
--- a/ui/views/widget/desktop_aura/desktop_window_tree_host_win.cc
+++ b/ui/views/widget/desktop_aura/desktop_window_tree_host_win.cc
@@ -918,8 +918,9 @@ void DesktopWindowTreeHostWin::HandleWindowSizeChanged() {
   // the screen). In that case do a resize to the current size to reenable
   // swaps.
   if (compositor()) {
-    compositor()->SetScaleAndSize(compositor()->device_scale_factor(),
-                                  GetBounds().size());
+    compositor()->SetScaleAndSize(
+        compositor()->device_scale_factor(),
+        message_handler_->GetClientAreaBounds().size());
   }
 }