Hide/show widget on Windows screen lock/unlock

ui/views/controls/native/native_view_host.cc

Index: ui/views/controls/native/native_view_host.cc
diff --git a/ui/views/controls/native/native_view_host.cc b/ui/views/controls/native/native_view_host.cc
index 452e5966b48334f7843fb332dd765b0095aafec8..ea6db3839a7577712f13ce4cbd5fe6afad8b42c7 100644
--- a/ui/views/controls/native/native_view_host.cc
+++ b/ui/views/controls/native/native_view_host.cc
@@ -127,6 +127,22 @@ void NativeViewHost::VisibilityChanged(View* starting_from, bool is_visible) {
   Layout();
 }
 
+void NativeViewHost::OnSoftVisibilityChanged(bool visible) {
+  if (!native_view_ || !native_wrapper_.get())
+    return;
+
+  if (GetVisibleBounds().IsEmpty())
+    return;
+
+  // If the widget wasn't .e.g. minimized, hide and show would trigger
+  // PageVisibility API, enabling JS to save power while screen is locked.
+  if (visible) {
+    Layout();
+  } else {
+    native_wrapper_->HideWidget();
+  }
+}
+
 bool NativeViewHost::GetNeedsNotificationWhenVisibleBoundsChange() const {
   // The native widget is placed relative to the root. As such, we need to
   // know when the position of any ancestor changes, or our visibility relative