Pass in the time of the user's last activity timestamp with the NET_ACTIVE_WINDOW event

ui/views/widget/desktop_aura/x11_desktop_handler.cc

Index: ui/views/widget/desktop_aura/x11_desktop_handler.cc
diff --git a/ui/views/widget/desktop_aura/x11_desktop_handler.cc b/ui/views/widget/desktop_aura/x11_desktop_handler.cc
index f33d4163e5f9125a8db3acd247a10fecd66e132b..d43b853093b6345fbfc772d611d1011879563e36 100644
--- a/ui/views/widget/desktop_aura/x11_desktop_handler.cc
+++ b/ui/views/widget/desktop_aura/x11_desktop_handler.cc
@@ -42,6 +42,7 @@ X11DesktopHandler* X11DesktopHandler::get() {
 X11DesktopHandler::X11DesktopHandler()
     : xdisplay_(gfx::GetXDisplay()),
       x_root_window_(DefaultRootWindow(xdisplay_)),
+      wm_user_time_ms_(0),
       current_window_(None),
       atom_cache_(xdisplay_, kAtomsToCache),
       wm_supports_active_window_(false) {
@@ -78,7 +79,7 @@ void X11DesktopHandler::ActivateWindow(::Window window) {
     xclient.xclient.message_type = atom_cache_.GetAtom("_NET_ACTIVE_WINDOW");
     xclient.xclient.format = 32;
     xclient.xclient.data.l[0] = 1;  // Specified we are an app.
-    xclient.xclient.data.l[1] = CurrentTime;
+    xclient.xclient.data.l[1] = wm_user_time_ms_;
     xclient.xclient.data.l[2] = None;
     xclient.xclient.data.l[3] = 0;
     xclient.xclient.data.l[4] = 0;