Move shelf item tooltip flag from delegate to item.

ash/mus/bridge/wm_window_mus.cc

Index: ash/mus/bridge/wm_window_mus.cc
diff --git a/ash/mus/bridge/wm_window_mus.cc b/ash/mus/bridge/wm_window_mus.cc
index cf7bbf49b4552ad2f164bcfbfdcdeb23f56205aa..a11a6aa9495b76a2a130d2bb816d21e9b46f59c2 100644
--- a/ash/mus/bridge/wm_window_mus.cc
+++ b/ash/mus/bridge/wm_window_mus.cc
@@ -136,6 +136,10 @@ bool WmWindowMus::GetBoolProperty(WmWindowProperty key) {
   return WmWindowAura::GetBoolProperty(key);
 }
 
+void WmWindowMus::SetBoolProperty(WmWindowProperty key, bool value) {

[sky, 2016/12/08 00:38:54]

Do we really need the override? Can't we use the implementation in WmWindowAura?

[msw, 2016/12/08 20:31:36]

Would that work? I'm not sure it matters; isn't this code [soon to be] dead?

[sky, 2016/12/08 20:52:42]

It should work, because the property is registered with the PropertyConverter,
right? Maybe I'm missing something?

[msw, 2016/12/08 21:00:21]

I guess I'm not sure what you have in mind here, I thought you meant calling
WmWindowAura::SetBoolProperty here (somehow) or making this function not virtual
and defining WmWindow::SetBoolProperty, but now I think you might mean something
else. What's the problem with leaving this unimplemented? WmWindowMus is going
away as soon as possible after switching mash to aura-mus, right? Sorry if I'm
misunderstanding.

[msw, 2016/12/08 21:18:19]

Done. Thanks for explaining offline that WmWindowMus is a WmWindowAura.

+  NOTIMPLEMENTED();
+}
+
 int WmWindowMus::GetIntProperty(WmWindowProperty key) {
   if (key == WmWindowProperty::SHELF_ITEM_TYPE) {
     if (aura_window()->GetProperty(kShelfItemTypeKey) != TYPE_UNDEFINED)