Native Messaging!

chrome/browser/extensions/api/messaging/extension_message_port.h

+// Copyright (c) 2012 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 CHROME_BROWSER_EXTENSIONS_API_MESSAGING_EXTENSION_MESSAGE_PORT_H_
+#define CHROME_BROWSER_EXTENSIONS_API_MESSAGING_EXTENSION_MESSAGE_PORT_H_
+
+#include "chrome/browser/extensions/api/messaging/message_service.h"
+
+namespace content {
+class RenderProcessHost;
+}  // namespace content
+
+namespace extensions {
+
+// A port that manages communication with an extension.
+class ExtensionMessagePort : public MessageService::MessagePort {
+ public:
+  ExtensionMessagePort(content::RenderProcessHost* process,
+                       int routing_id,
+                       const std::string& extension_id);
+  virtual void DispatchOnConnect(
+      int dest_port_id,
+      const std::string& channel_name,
+      const std::string& tab_json,
+      const std::string& source_extension_id,
+      const std::string& target_extension_id) OVERRIDE;
+  virtual void DispatchOnDisconnect(int source_port_id,
+                                    bool connection_error) OVERRIDE;
+  virtual void DispatchOnMessage(const std::string& message,
+                                 int target_port_id) OVERRIDE;
+  virtual void IncrementLazyKeepaliveCount() OVERRIDE;
+  virtual void DecrementLazyKeepaliveCount() OVERRIDE;
+  virtual content::RenderProcessHost* GetRenderProcessHost() OVERRIDE;
+
+ private:
+  content::RenderProcessHost* process_;
+  int routing_id_;
+  std::string extension_id_;
+  void* background_host_ptr_;  // used in IncrementLazyKeepaliveCount
+};
+
+}  // namespace extensions
+
+#endif  // CHROME_BROWSER_EXTENSIONS_API_MESSAGING_EXTENSION_MESSAGE_PORT_H_