Implement onEvent callback framework for UDP

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

Index: chrome/browser/extensions/api/socket/socket_api.h
diff --git a/chrome/browser/extensions/api/socket/socket_api.h b/chrome/browser/extensions/api/socket/socket_api.h
index 8d1a7a2560c7f1f3d8b06ba96454ad1b7ad295e7..5f6c80cae11eafbba01c268041da297dd4ed1a36 100644
--- a/chrome/browser/extensions/api/socket/socket_api.h
+++ b/chrome/browser/extensions/api/socket/socket_api.h
@@ -45,11 +45,17 @@ class SocketApiFunction : public AsyncExtensionFunction {
 // one that created the socket. Too bad.
 
 class SocketCreateFunction : public SocketApiFunction {
+ public:
+  SocketCreateFunction();
+
  protected:
   virtual bool Prepare() OVERRIDE;
   virtual void Work() OVERRIDE;
   virtual bool Respond() OVERRIDE;
 
+ private:
+  int src_id_;
+
   DECLARE_EXTENSION_FUNCTION_NAME("experimental.socket.create")
 };