mash: Fix launching touch hud app in mash mode.

ash/touch_hud/mus/touch_hud_application.cc

Index: ash/touch_hud/mus/touch_hud_application.cc
diff --git a/ash/touch_hud/mus/touch_hud_application.cc b/ash/touch_hud/mus/touch_hud_application.cc
index 702560b61d5014f2178068aa30d84772847484e4..0c82b98120c375c1c67710dcfce031ffb42217b6 100644
--- a/ash/touch_hud/mus/touch_hud_application.cc
+++ b/ash/touch_hud/mus/touch_hud_application.cc
@@ -33,7 +33,7 @@ class TouchHudUI : public views::WidgetDelegateView,
       : window_manager_connection_(window_manager_connection),
         touch_hud_renderer_(new TouchHudRenderer(widget)) {
     window_manager_connection_->pointer_watcher_event_router()
-        ->AddPointerWatcher(this, false /* want_moves */);
+        ->AddPointerWatcher(this, true /* want_moves */);
   }
   ~TouchHudUI() override {
     window_manager_connection_->pointer_watcher_event_router()
@@ -108,6 +108,7 @@ void TouchHudApplication::Launch(uint32_t what, mash::mojom::LaunchMode how) {
 
 void TouchHudApplication::Create(const shell::Identity& remote_identity,
                                  mash::mojom::LaunchableRequest request) {
+  binding_.Close();
   binding_.Bind(std::move(request));
 }