Conditionally call SchedulePaint() when activating and deactivating inactive rendering

ui/views/widget/widget.cc

Index: ui/views/widget/widget.cc
diff --git a/ui/views/widget/widget.cc b/ui/views/widget/widget.cc
index c18ac06426a3729b2f56708ecc621ae5a443f1f7..d64f650ed68ca4c6a2921ef6cffd4e2a001533e8 100644
--- a/ui/views/widget/widget.cc
+++ b/ui/views/widget/widget.cc
@@ -1283,10 +1283,10 @@ bool Widget::ShouldReleaseCaptureOnMouseReleased() const {
 }
 
 void Widget::SetInactiveRenderingDisabled(bool value) {
+  if (value == disable_inactive_rendering_)
+    return;
+
   disable_inactive_rendering_ = value;
-  // We need to always notify the NonClientView so that it can trigger a paint.
-  // TODO: what's really needed is a way to know when either the active state
-  // changes or |disable_inactive_rendering_| changes.
   if (non_client_view_)
     non_client_view_->SetInactiveRenderingDisabled(value);
   native_widget_->SetInactiveRenderingDisabled(value);