Step two of optionally sending messages to/from message ports as base::Value.

content/browser/navigator_connect/navigator_connect_context_impl.h

Index: content/browser/navigator_connect/navigator_connect_context_impl.h
diff --git a/content/browser/navigator_connect/navigator_connect_context_impl.h b/content/browser/navigator_connect/navigator_connect_context_impl.h
index ce18d9ca50f400b2f2e78e445fee2b9af46048f5..1f53c5379a57455dcb8703143288a4c3c2d7aef2 100644
--- a/content/browser/navigator_connect/navigator_connect_context_impl.h
+++ b/content/browser/navigator_connect/navigator_connect_context_impl.h
@@ -14,9 +14,10 @@
 namespace content {
 
 class MessagePortMessageFilter;
-struct NavigatorConnectClient;
 class NavigatorConnectService;
 class NavigatorConnectServiceFactory;
+struct NavigatorConnectClient;
+struct TransferredMessagePort;
 
 // Tracks all active navigator.connect connections, as well as available service
 // factories. Delegates connection requests to the correct factory and passes
@@ -25,8 +26,10 @@ class NavigatorConnectServiceFactory;
 // TODO(mek): Somehow clean up connections when the client side goes away.
 class NavigatorConnectContextImpl : public NavigatorConnectContext {
  public:
-  using ConnectCallback = base::Callback<
-      void(int message_port_id, int message_port_route_id, bool success)>;
+  using ConnectCallback =
+      base::Callback<void(const TransferredMessagePort& message_port,
+                          int message_port_route_id,
+                          bool success)>;
 
   explicit NavigatorConnectContextImpl();