Add the ability to use AllowAddressReuse for UDP sockets.

chrome/browser/extensions/api/socket/udp_socket.cc

Index: chrome/browser/extensions/api/socket/udp_socket.cc
diff --git a/chrome/browser/extensions/api/socket/udp_socket.cc b/chrome/browser/extensions/api/socket/udp_socket.cc
index 3f6080d69ceb4b28f90fb40e22833fb6d147903a..233b9aa3314fc0b42781629d93791f8ef6cb4194 100644
--- a/chrome/browser/extensions/api/socket/udp_socket.cc
+++ b/chrome/browser/extensions/api/socket/udp_socket.cc
@@ -243,6 +243,14 @@ int UDPSocket::JoinGroup(const std::string& address) {
   return rv;
 }
 
+int UDPSocket::AllowAddressReuse() {
+  if (socket_.is_connected()) {
+    return net::ERR_UNEXPECTED;
+  }
+  socket_.AllowAddressReuse();
+  return net::OK;

[mmenke, 2013/05/24 21:12:00]

I think "return 0;" is actually more consistent with the rest of these two
files, particularly since the caller compares the result directly with 0, not
net::OK.

Ideally, I think a lot of the 0 comparisons should be checking against net::OK,
but changing that is beyond the scoope of this CL.

[Noam Samuel, 2013/05/24 21:43:53]

Done.

+}
+
 int UDPSocket::LeaveGroup(const std::string& address) {
   net::IPAddressNumber ip;
   if (!net::ParseIPLiteralToNumber(address, &ip))