mus: Disregard windows that explicitly set can_accept_events to be false when sending events.

ui/views/mus/native_widget_mus.cc

Index: ui/views/mus/native_widget_mus.cc
diff --git a/ui/views/mus/native_widget_mus.cc b/ui/views/mus/native_widget_mus.cc
index 96e1152550ed51fd2f174643fd47fb5fc6dd7770..fe8bbd9ea47650786409b6ddd5f12c076cf32287 100644
--- a/ui/views/mus/native_widget_mus.cc
+++ b/ui/views/mus/native_widget_mus.cc
@@ -682,6 +682,8 @@ void NativeWidgetMus::InitNativeWidget(const Widget::InitParams& params) {
   ownership_ = params.ownership;
   window_->SetCanFocus(params.activatable ==
                        Widget::InitParams::ACTIVATABLE_YES);
+  if (!params.accept_events)
+    window_->SetAcceptEvents(params.accept_events);

[sadrul, 2016/07/09 14:51:22]

You can do this unconditionally (like SetCanFocus above). Although I suppose it
would make sense to teach ui::Window to not send any IPC if the setting is not
changing?

[riajiang, 2016/07/11 15:48:38]

Changed it to do the checking in window_tree_client before it sends IPC calls.

 
   window_tree_host_->AddObserver(this);
   window_tree_host_->InitHost();