Pass embedding app identity through at embed time

mojo/services/view_manager/view_manager_connection.h

Index: mojo/services/view_manager/view_manager_connection.h
diff --git a/mojo/services/view_manager/view_manager_connection.h b/mojo/services/view_manager/view_manager_connection.h
index 2c55e1ef12cde769578933418c3ac0c1bf8f750e..71355e17192db955ba4c83d50c1b1c70be097e57 100644
--- a/mojo/services/view_manager/view_manager_connection.h
+++ b/mojo/services/view_manager/view_manager_connection.h
@@ -43,6 +43,7 @@ class MOJO_VIEW_MANAGER_EXPORT ViewManagerConnection
  public:
   ViewManagerConnection(RootNodeManager* root_node_manager,
                         ConnectionSpecificId creator_id,
+                        const std::string& creator_url,
                         const std::string& url);
   virtual ~ViewManagerConnection();
 
@@ -215,6 +216,9 @@ class MOJO_VIEW_MANAGER_EXPORT ViewManagerConnection
   // created by the root, or the connection that created us has been destroyed.
   ConnectionSpecificId creator_id_;
 
+  // The URL of the app that embedded the app this connection was created for.
+  const std::string creator_url_;
+
   NodeMap node_map_;
 
   ViewMap view_map_;