Enable messaging over a navigator.connect initiated channel.

content/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_BROWSER_MESSAGE_PORT_DELEGATE_H_
+#define CONTENT_BROWSER_MESSAGE_PORT_DELEGATE_H_
+
+#include <vector>
+#include "base/strings/string16.h"

[Avi (use Gerrit), 2014/12/19 21:58:14]

space before this line

[Marijn Kruisselbrink, 2014/12/19 22:13:07]

Done.

+
+namespace content {
+
+// Delegate used by MessagePortService to send messages to message ports to the
+// correct renderer. Delegates are responsible for managing their own lifetime,
+// and should call MessagePortService::OnMessagePortDelegateClosing if they are
+// destroyed while there are still message ports associated with them.
+class 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 base::string16& message,
+                           const std::vector<int>& sent_message_port_ids) = 0;

[Avi (use Gerrit), 2014/12/19 21:58:14]

set?

[Marijn Kruisselbrink, 2014/12/19 22:13:07]

I'm pretty sure this actually has to be an ordered list. The postMessage and
MessageEvent spec seem to be quite explicit that order matters for this list
(this list directly gets translated into the MessageEvents ports attribute)

+
+  // Sends a "messages are queued" IPC to the given route.
+  virtual void SendMessagesAreQueued(int route_id) = 0;
+
+ protected:
+  virtual ~MessagePortDelegate() {}
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_MESSAGE_PORT_DELEGATE_H_