Remove code that was only used by navigator.connect.

content/browser/message_port_message_filter.h

Index: content/browser/message_port_message_filter.h
diff --git a/content/browser/message_port_message_filter.h b/content/browser/message_port_message_filter.h
index 14a5cf7d80652d1dc9232aac1b2860631b8a3acd..7edc9411fd2903f018c353b1b2cde9227ab24351 100644
--- a/content/browser/message_port_message_filter.h
+++ b/content/browser/message_port_message_filter.h
@@ -19,7 +19,6 @@
 struct FrameMsg_PostMessage_Params;
 
 namespace content {
-struct TransferredMessagePort;
 
 // Filter for MessagePort related IPC messages (creating and destroying a
 // MessagePort, sending a message via a MessagePort etc).
@@ -43,14 +42,14 @@ class CONTENT_EXPORT MessagePortMessageFilter
   // MessagePortDelegate implementation.
   void SendMessage(
       int route_id,
-      const MessagePortMessage& message,
-      const std::vector<TransferredMessagePort>& sent_message_ports) override;
+      const base::string16& message,
+      const std::vector<int>& sent_message_ports) override;
   void SendMessagesAreQueued(int route_id) override;
 
   // Updates message ports registered for |message_ports| and returns
   // new routing IDs for the updated ports via |new_routing_ids|.
   void UpdateMessagePortsWithNewRoutes(
-      const std::vector<TransferredMessagePort>& message_ports,
+      const std::vector<int>& message_ports,
       std::vector<int>* new_routing_ids);
 
   void RouteMessageEventWithMessagePorts(