Take overscan into account when handling passive grab

ash/host/ash_window_tree_host_x11.cc

Index: ash/host/ash_window_tree_host_x11.cc
diff --git a/ash/host/ash_window_tree_host_x11.cc b/ash/host/ash_window_tree_host_x11.cc
index e49e9617727490faa3b400f4998022d46c448f86..6d32e2bf65180a4dcb718d4db0ec0f77de2a4f5a 100644
--- a/ash/host/ash_window_tree_host_x11.cc
+++ b/ash/host/ash_window_tree_host_x11.cc
@@ -340,7 +340,7 @@ void AshWindowTreeHostX11::TranslateAndDispatchLocatedEvent(
       aura::client::ScreenPositionClient* screen_position_client =
           aura::client::GetScreenPositionClient(root_window);
       gfx::Rect local(bounds().size());
-
+      local.Inset(transformer_helper_.GetHostInsets());
       if (screen_position_client && !local.Contains(event->location())) {
         gfx::Point location(event->location());
         // In order to get the correct point in screen coordinates