Properly queue messages sent to message ports that are transferred to a service worker.

content/browser/message_port_service.h

Index: content/browser/message_port_service.h
diff --git a/content/browser/message_port_service.h b/content/browser/message_port_service.h
index 668959167f724e79ebfd914042438fb0128b5060..78dea8a820bef577b613c7864a72682458fb07bc 100644
--- a/content/browser/message_port_service.h
+++ b/content/browser/message_port_service.h
@@ -37,6 +37,7 @@ class MessagePortService {
   void QueueMessages(int message_port_id);
   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.
@@ -45,6 +46,17 @@ class MessagePortService {
       MessagePortMessageFilter* filter,
       int routing_id);
 
+  // The message port is being transferred to a new renderer process, but the
+  // code doing isn't able to immediately update the message port with a new

[falken, 2014/11/20 03:42:43]

"code doing that"?

[Marijn Kruisselbrink, 2014/11/20 22:14:43]

Done.

+  // filter and routing_id. This queues up all messages sent to this port until
+  // later ReleaseMessages is called for this port. If ultimately transfering
+  // the port to a new process fails, ClosePost should be called to clean up the
+  // port.
+  void HoldMessages(int message_port_id);
+
+  // Closes and cleans up the message port.
+  void ClosePort(int message_port_id);
+
   void OnMessagePortMessageFilterClosing(MessagePortMessageFilter* filter);
 
   // Attempts to send the queued messages for a message port.