Implement onEvent callback framework for UDP

chrome/browser/extensions/api/socket/socket_api_controller.h

 // Copyright (c) 2011 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_SOCKET_SOCKET_API_CONTROLLER_H_
 #define CHROME_BROWSER_EXTENSIONS_API_SOCKET_SOCKET_API_CONTROLLER_H_
 #pragma once
 
 #include <string>
 #include <map>
@@ skipping 10 matching lines @@
 class Value;
 }
 
 namespace net {
 class UDPClientSocket;
 class IPEndPoint;
 }
 
 namespace extensions {
 
+// kSrcIdKey, or "srcId," binds a socket to the onEvent closure that was
+// optionally passed to the socket.create() method. It's generated by us in
+// schema_generated_bindings.js; the application code is unaware of it.
+extern const char kSrcIdKey[];
+
 class Socket;
 
 // SocketController keeps track of a collection of Sockets and provides a
 // convenient set of methods to manipulate them.
 class SocketController {
  public:
   SocketController();
   virtual ~SocketController();
 
   // Create/Destroy are a pair. They represent the allocation and deallocation
   // of the Socket object in memory.
   //
   // TODO(miket): aa's suggestion to track lifetime of callbacks associated
   // with each socket, which will then let us clean up when we go out of scope
   // rather than requiring that the app developer remember to call Destroy.
-  int CreateUdp(const Profile* profile, const std::string& extension_id,
+  int CreateUdp(Profile* profile, const std::string& extension_id, int src_id,
                 const GURL& src_url);
   bool DestroyUdp(int socket_id);
 
   // Connect, Close, Read, and Write map to the equivalent methods in
   // UDPClientSocket.
   //
   // TODO(miket): Implement Read.
   bool ConnectUdp(int socket_id, const std::string address, int port);
   void CloseUdp(int socket_id);
   int WriteUdp(int socket_id, const std::string msg);
@@ skipping 10 matching lines @@
 
   // Convenience method for accessing SocketMap.
   Socket* GetSocket(int socket_id);
 
   DISALLOW_COPY_AND_ASSIGN(SocketController);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_SOCKET_SOCKET_API_CONTROLLER_H_