Add simple mash context menu support.

chrome/browser/chromeos/chrome_interface_factory.cc

Index: chrome/browser/chromeos/chrome_interface_factory.cc
diff --git a/chrome/browser/chromeos/chrome_interface_factory.cc b/chrome/browser/chromeos/chrome_interface_factory.cc
index 136e5500fcacecf96ffe7e5406b226d8e0973f0c..6c9d5a7272af433f998ec43477b1cf3795888beb 100644
--- a/chrome/browser/chromeos/chrome_interface_factory.cc
+++ b/chrome/browser/chromeos/chrome_interface_factory.cc
@@ -4,6 +4,7 @@
 
 #include "chrome/browser/chromeos/chrome_interface_factory.h"
 
+#include "chrome/browser/ui/ash/context_menu.h"
 #include "chrome/browser/ui/ash/keyboard_ui_service.h"
 #include "mojo/shell/public/cpp/connection.h"
 
@@ -25,4 +26,12 @@ void ChromeInterfaceFactory::Create(
   keyboard_bindings_.AddBinding(keyboard_ui_service_.get(), std::move(request));
 }
 
+void ChromeInterfaceFactory::Create(
+    mojo::Connection* connection,
+    mojo::InterfaceRequest<mash::shelf::mojom::ContextMenu> request) {
+  if (!context_menu_)
+    context_menu_.reset(new ContextMenu);
+  context_menu_bindings_.AddBinding(context_menu_.get(), std::move(request));
+}
+
 }  // namespace chromeos