Initial implementation of stashed message ports, content side

content/browser/message_port_service.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_BROWSER_MESSAGE_PORT_SERVICE_H_
 #define CONTENT_BROWSER_MESSAGE_PORT_SERVICE_H_
 
 #include <map>
 #include <utility>
 #include <vector>
@@ skipping 31 matching lines @@
   void SendQueuedMessages(int message_port_id,
                           const QueuedMessages& queued_messages);
   void ReleaseMessages(int message_port_id);
 
   // Updates the information needed to reach a message port when it's sent to a
   // (possibly different) process.
   void UpdateMessagePort(int message_port_id,
                          MessagePortDelegate* delegate,
                          int routing_id);
 
+  // Returns the current information by which a message port can be reached.
+  // Either |delegate| or |routing_id| can be null, in which case that bit of
+  // information is not returned.
+  void GetMessagePortInfo(int message_port_id,
+                          MessagePortDelegate** delegate,
+                          int* routing_id);
+
   // The message port is being transferred to a new renderer process, but the
   // code doing that isn't able to immediately update the message port with a
   // new filter and routing_id. This queues up all messages sent to this port
   // until later ReleaseMessages is called for this port (this will happen
   // automatically as soon as a WebMessagePortChannelImpl instance is created
   // for this port in the renderer. The browser side code is still responsible
   // for updating the port with a new filter before that happens. If ultimately
   // transfering the port to a new process fails, ClosePort should be called to
   // clean up the port.
   void HoldMessages(int message_port_id);
@@ skipping 27 matching lines @@
 
   // We need globally unique identifiers for each message port.
   int next_message_port_id_;
 
   DISALLOW_COPY_AND_ASSIGN(MessagePortService);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_MESSAGE_PORT_SERVICE_H_