Add the ability to use AllowAddressReuse for UDP sockets.

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

Index: chrome/browser/extensions/api/socket/socket_api.cc
diff --git a/chrome/browser/extensions/api/socket/socket_api.cc b/chrome/browser/extensions/api/socket/socket_api.cc
index 49699d26b932aafe61c2bec7ef0062f6bbd045b7..0dc43ec9b6299e3c9c872776a9454d24cef84d9e 100644
--- a/chrome/browser/extensions/api/socket/socket_api.cc
+++ b/chrome/browser/extensions/api/socket/socket_api.cc
@@ -44,6 +44,9 @@ const char kTCPSocketBindError[] =
     "TCP socket does not support bind. For TCP server please use listen.";
 const char kMulticastSocketTypeError[] =
     "Only UDP socket supports multicast.";
+const char kAddressReuseSocketTypeError[] =
+    "There is no need to call AllowReuseAddress on TCP sockets, as TCP sockets"
+    " support address reuse by default.";
 const char kWildcardAddress[] = "*";
 const int kWildcardPort = 0;
 
@@ -742,7 +745,6 @@ void SocketJoinGroupFunction::Work() {
   SetResult(Value::CreateIntegerValue(result));
 }
 
-
 SocketLeaveGroupFunction::SocketLeaveGroupFunction()
   : params_(NULL) {}
 
@@ -899,4 +901,36 @@ void SocketGetJoinedGroupsFunction::Work() {
   SetResult(values);
 }
 
+SocketAllowAddressReuseFunction::SocketAllowAddressReuseFunction()
+    : params_(NULL) {}
+
+SocketAllowAddressReuseFunction::~SocketAllowAddressReuseFunction() {}
+
+bool SocketAllowAddressReuseFunction::Prepare() {
+  params_ = api::socket::AllowAddressReuse::Params::Create(*args_);
+  EXTENSION_FUNCTION_VALIDATE(params_.get());
+  return true;
+}
+
+void SocketAllowAddressReuseFunction::Work() {
+  int result = -1;
+  Socket* socket = GetSocket(params_->socket_id);
+  if (!socket) {
+    error_ = kSocketNotFoundError;
+    SetResult(Value::CreateIntegerValue(result));
+    return;
+  }
+
+  if (socket->GetSocketType() != Socket::TYPE_UDP) {
+    error_ = kAddressReuseSocketTypeError;
+    SetResult(Value::CreateIntegerValue(result));
+    return;
+  }
+
+  result = static_cast<UDPSocket*>(socket)->AllowAddressReuse();
+  if (result != 0)
+    error_ = net::ErrorToString(result);
+  SetResult(Value::CreateIntegerValue(result));
+}
+
 }  // namespace extensions