Add ability to reuse address in chrome.sockets.udp

extensions/browser/api/socket/udp_socket.h

Index: extensions/browser/api/socket/udp_socket.h
diff --git a/extensions/browser/api/socket/udp_socket.h b/extensions/browser/api/socket/udp_socket.h
index 17a4117441c8eb98b11531b5a85a59f1a550ebc0..9ab54c385df923d3f5e1254b662bf549f9222522 100644
--- a/extensions/browser/api/socket/udp_socket.h
+++ b/extensions/browser/api/socket/udp_socket.h
@@ -49,6 +49,9 @@ class UDPSocket : public Socket {
 
   const std::vector<std::string>& GetJoinedGroups() const;
 
+  bool allow_address_reuse() const { return allow_address_reuse_; }
+  void set_allow_address_reuse(bool allow) { allow_address_reuse_ = allow; }
+
  protected:
   int WriteImpl(net::IOBuffer* io_buffer,
                 int io_buffer_size,
@@ -73,6 +76,10 @@ class UDPSocket : public Socket {
   CompletionCallback send_to_callback_;
 
   std::vector<std::string> multicast_groups_;
+
+  // Flag indicating whether the address can be bound by multiple sockets - see
+  // sockets_udp.idl
+  bool allow_address_reuse_;
 };
 
 // UDP Socket instances from the "sockets.udp" namespace. These are regular