mash: Fix launching touch hud app in mash mode.

ash/touch_hud/mus/touch_hud_application.h

Index: ash/touch_hud/mus/touch_hud_application.h
diff --git a/ash/touch_hud/mus/touch_hud_application.h b/ash/touch_hud/mus/touch_hud_application.h
index 0d9144e87765b1f685e564db4e9e29f23bd769ac..b94810deef382e87e78abfd03fdaf3b22a5bee26 100644
--- a/ash/touch_hud/mus/touch_hud_application.h
+++ b/ash/touch_hud/mus/touch_hud_application.h
@@ -9,7 +9,7 @@
 
 #include "base/macros.h"
 #include "mash/public/interfaces/launchable.mojom.h"
-#include "mojo/public/cpp/bindings/binding.h"
+#include "mojo/public/cpp/bindings/binding_set.h"
 #include "services/shell/public/cpp/service.h"
 
 namespace views {
@@ -42,7 +42,7 @@ class TouchHudApplication
   void Create(const shell::Identity& remote_identity,
               mash::mojom::LaunchableRequest request) override;
 
-  mojo::Binding<mash::mojom::Launchable> binding_;
+  mojo::BindingSet<mash::mojom::Launchable> bindings_;

[sadrul, 2016/09/02 00:52:28]

Why would we need a BindingSet<>?

[riajiang, 2016/09/02 18:18:38]

As discussed, changing back to Binding.

   views::Widget* widget_ = nullptr;
 
   std::unique_ptr<views::AuraInit> aura_init_;