Refactor navigator.connect code to make it more flexible.

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 7acc141c2543417e4efc87fbbf38ef5a89cb0ca5..678118cd95ccc0cdd13831a049a38424d23fd609 100644
--- a/content/browser/message_port_message_filter.h
+++ b/content/browser/message_port_message_filter.h
@@ -32,9 +32,10 @@ class CONTENT_EXPORT MessagePortMessageFilter
   int GetNextRoutingID();
 
   // MessagePortDelegate implementation.
-  void SendMessage(int route_id,
-                   const base::string16& message,
-                   const std::vector<int>& sent_message_port_ids) override;
+  void SendMessageToPort(
+      int route_id,
+      const base::string16& message,
+      const std::vector<int>& sent_message_port_ids) override;
   void SendMessagesAreQueued(int route_id) override;
 
   // Updates message ports registered for |message_port_ids| and returns