Add GetBoundAddress to PPB_UDPSocket_Private

ppapi/shared_impl/private/udp_socket_private_impl.cc

Index: ppapi/shared_impl/private/udp_socket_private_impl.cc
diff --git a/ppapi/shared_impl/private/udp_socket_private_impl.cc b/ppapi/shared_impl/private/udp_socket_private_impl.cc
index d596b022eb4b7c98de3857b022bbe36111f9bcaa..3879b68b26d1db5ac63dacc3b5169ff6c5214cc9 100644
--- a/ppapi/shared_impl/private/udp_socket_private_impl.cc
+++ b/ppapi/shared_impl/private/udp_socket_private_impl.cc
@@ -58,6 +58,14 @@ int32_t UDPSocketPrivateImpl::Bind(const PP_NetAddress_Private* addr,
   return PP_OK_COMPLETIONPENDING;
 }
 
+PP_Bool UDPSocketPrivateImpl::GetBoundAddress(PP_NetAddress_Private* addr) {
+  if (!addr || !bound_ || closed_)
+    return PP_FALSE;
+
+  *addr = bound_addr_;
+  return PP_TRUE;
+}
+
 int32_t UDPSocketPrivateImpl::RecvFrom(char* buffer,
                                        int32_t num_bytes,
                                        PP_CompletionCallback callback) {
@@ -122,7 +130,9 @@ void UDPSocketPrivateImpl::Close() {
   PostAbortIfNecessary(&sendto_callback_);
 }
 
-void UDPSocketPrivateImpl::OnBindCompleted(bool succeeded) {
+void UDPSocketPrivateImpl::OnBindCompleted(
+    bool succeeded,
+    const PP_NetAddress_Private& addr) {
   if (!TrackedCallback::IsPending(bind_callback_)) {
     NOTREACHED();
     return;
@@ -131,8 +141,10 @@ void UDPSocketPrivateImpl::OnBindCompleted(bool succeeded) {
   if (succeeded)
     bound_ = true;
 
+  bound_addr_ = addr;
+
   TrackedCallback::ClearAndRun(&bind_callback_,
-                               succeeded ? PP_OK : PP_ERROR_FAILED);
+      succeeded ? PP_OK : PP_ERROR_FAILED);
 }
 
 void UDPSocketPrivateImpl::OnRecvFromCompleted(
@@ -180,6 +192,9 @@ void UDPSocketPrivateImpl::Init(uint32 socket_id) {
   recvfrom_addr_.size = 0;
   memset(recvfrom_addr_.data, 0,
          arraysize(recvfrom_addr_.data) * sizeof(*recvfrom_addr_.data));
+  bound_addr_.size = 0;
+  memset(bound_addr_.data, 0,
+         arraysize(bound_addr_.data) * sizeof(*bound_addr_.data));
 }
 
 void UDPSocketPrivateImpl::PostAbortIfNecessary(