Remote Assistance on Chrome OS Part II - Native Messaging renaming

extensions/browser/api/messaging/native_messaging_channel.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 EXTENSIONS_BROWSER_API_MESSAGING_NATIVE_MESSAGING_CHANNEL_H_
+#define EXTENSIONS_BROWSER_API_MESSAGING_NATIVE_MESSAGING_CHANNEL_H_
+
+#include "base/callback.h"
+
+namespace base {
+class Value;
+}  // namespace base
+
+namespace extensions {
+
+// An interface to receive and send messages between a native component and
+// chrome.
+class NativeMessagingChannel {
+ public:
+  // Callback interface for the channel. EventHandler must outlive
+  // NativeMessagingChannel.
+  class EventHandler {
+   public:
+    // Called when a message is received from the other endpoint.
+    virtual void OnMessage(scoped_ptr<base::Value> message) = 0;
+
+    // Called when the channel is disconnected.
+    // EventHandler is guaranteed not to be called after OnDisconnect().
+    virtual void OnDisconnect() = 0;
+
+    virtual ~EventHandler() {}
+  };
+
+  virtual ~NativeMessagingChannel() {}
+
+  // Starts reading and processing messages.
+  virtual void Start(EventHandler* event_handler) = 0;
+
+  // Sends a message to the other endpoint.
+  virtual void SendMessage(scoped_ptr<base::Value> message) = 0;
+};
+
+}  // namespace extensions
+
+#endif  // EXTENSIONS_BROWSER_API_MESSAGING_NATIVE_MESSAGING_CHANNEL_H_