mash: Support ShelfModel access in Chrome.

ash/public/cpp/shelf_item_delegate.h

Index: ash/public/cpp/shelf_item_delegate.h
diff --git a/ash/public/cpp/shelf_item_delegate.h b/ash/public/cpp/shelf_item_delegate.h
index 7b4dce25d882b37bca816d67b4cd687deb5c79e7..10562b1834b860d12e47a5a6640e65e6bc74cc98 100644
--- a/ash/public/cpp/shelf_item_delegate.h
+++ b/ash/public/cpp/shelf_item_delegate.h
@@ -12,6 +12,7 @@
 #include "ash/public/interfaces/shelf.mojom.h"
 #include "base/compiler_specific.h"
 #include "base/macros.h"
+#include "mojo/public/cpp/bindings/binding.h"
 #include "ui/events/event.h"
 
 class AppWindowLauncherItemController;
@@ -37,6 +38,9 @@ class ASH_PUBLIC_EXPORT ShelfItemDelegate : public mojom::ShelfItemDelegate {
     image_set_by_controller_ = image_set_by_controller;
   }
 
+  // Returns a pointer to this instance, to be used by remote shelf models, etc.
+  mojom::ShelfItemDelegatePtr CreateInterfacePtrAndBind();
+
   // Returns items for the application menu; used for convenience and testing.
   virtual MenuItemList GetAppMenuItems(int event_flags);
 
@@ -51,6 +55,9 @@ class ASH_PUBLIC_EXPORT ShelfItemDelegate : public mojom::ShelfItemDelegate {
   // identify each shelf item that has the same app_id.
   ShelfID shelf_id_;
 
+  // A binding used by remote shelf item delegate users.
+  mojo::Binding<mojom::ShelfItemDelegate> binding_;
+
   // Set to true if the launcher item image has been set by the controller.
   bool image_set_by_controller_;