Added broadcasting feature to UDP server sockets.

net/udp/udp_socket_win.h

Index: net/udp/udp_socket_win.h
diff --git a/net/udp/udp_socket_win.h b/net/udp/udp_socket_win.h
index bd47496ee81048ab60f783076c26d5bce17a2002..0fb2bc20b63c4fcc35560b9324c334c5ecb29ab1 100644
--- a/net/udp/udp_socket_win.h
+++ b/net/udp/udp_socket_win.h
@@ -105,7 +105,16 @@ class NET_EXPORT UDPSocketWin : NON_EXPORTED_BASE(public base::NonThreadSafe) {
 
   const BoundNetLog& NetLog() const { return net_log_; }
 
+  void AllowAddressReuse();
+
+  void AllowBroadcast();
+
  private:
+  enum SocketOptions {
+    SOCKET_OPTION_REUSE_ADDRESS = 1 << 0,
+    SOCKET_OPTION_BROADCAST     = 1 << 1
+  };
+
   class ReadDelegate : public base::win::ObjectWatcher::Delegate {
    public:
     explicit ReadDelegate(UDPSocketWin* socket) : socket_(socket) {}
@@ -156,6 +165,7 @@ class NET_EXPORT UDPSocketWin : NON_EXPORTED_BASE(public base::NonThreadSafe) {
   int InternalRecvFrom(IOBuffer* buf, int buf_len, IPEndPoint* address);
   int InternalSendTo(IOBuffer* buf, int buf_len, const IPEndPoint* address);
 
+  int SetSocketOptions();
   int DoBind(const IPEndPoint& address);
   int RandomBind(const IPEndPoint& address);
 
@@ -164,6 +174,7 @@ class NET_EXPORT UDPSocketWin : NON_EXPORTED_BASE(public base::NonThreadSafe) {
   bool ReceiveAddressToIPEndpoint(IPEndPoint* address) const;
 
   SOCKET socket_;
+  int socket_options_;
 
   // How to do source port binding, used only when UDPSocket is part of
   // UDPClientSocket, since UDPServerSocket provides Bind.