Initial implementation of stashed message ports, content side

content/public/browser/message_port_delegate.h

 // Copyright 2014 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_PUBLIC_BROWSER_MESSAGE_PORT_DELEGATE_H_
 #define CONTENT_PUBLIC_BROWSER_MESSAGE_PORT_DELEGATE_H_
 
 #include <vector>
 
 #include "base/strings/string16.h"
@@ skipping 14 matching lines @@
 // destroyed while there are still message ports associated with them.
 class CONTENT_EXPORT MessagePortDelegate {
  public:
   // Sends a message to the given route. Implementations are responsible for
   // updating MessagePortService with new routes for the sent message ports.
   virtual void SendMessage(
       int route_id,
       const MessagePortMessage& message,
       const std::vector<TransferredMessagePort>& sent_message_ports) = 0;
 
+  // Called when MessagePortService tried to send a message to a port, but
+  // instead added it to its queue because the port is currently configured to
+  // hold all its messages.
+  virtual void MessageWasHeld(int route_id){};

[falken, 2015/05/15 06:08:02]

should have a space before {}?

[Marijn Kruisselbrink, 2015/05/18 22:19:36]

Ah yes, seems to be a bug in git cl format/clang-format (it removes the space),
but the style guide is pretty clear that the space should be there.

+
   // Requests messages to the given route to be queued.
   virtual void SendMessagesAreQueued(int route_id) = 0;
 
  protected:
   virtual ~MessagePortDelegate() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_MESSAGE_PORT_DELEGATE_H_