Add client access to ui

lib/vagrant/ui.rb

@@ -83,6 +83,11 @@ module Vagrant
       def rewriting
         yield self
       end
+
+      def to_proto
+        raise NotImplementedError,
+          "Vagrant::UI::Interface#to_proto"
+      end
     end
 
     # This is a UI implementation that does nothing.
@@ -296,6 +301,14 @@ module Vagrant
         @ui     = ui
       end
 
+      def to_proto
+        @ui.to_proto
+      end
+
+      def client
+        @ui.client
+      end
+
       def initialize_copy(original)
         super
         @ui = original.instance_variable_get(:@ui).dup

lib/vagrant/ui/remote.rb

@@ -1,6 +1,8 @@
 module Vagrant
   module UI
     class Remote < Basic
+      attr_reader :client
+
       def initialize(client)
         super()
         @client = client