bridges : use frozen unordered map

Change-Id: I8ba732ef5b0e7600c70a2ce880db343945b594bf
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/183246
Tested-by: Arnaud Versini <arnaud.versini@pm.me>
Tested-by: Jenkins
Reviewed-by: Arnaud Versini <arnaud.versini@pm.me>

bridges/Library_net_uno.mk

@@ -22,6 +22,11 @@ $(eval $(call gb_Library_use_libraries,net_uno,\
 	salhelper \
 ))
 
+$(eval $(call gb_Library_use_externals,net_uno,\
+    frozen \
+))
+
+
 $(eval $(call gb_Library_add_exception_objects,net_uno,\
 	bridges/source/net_uno/net_base \
 	bridges/source/net_uno/net_bridge \

bridges/source/net_uno/net_data.cxx

@@ -11,9 +11,10 @@
 #include "net_proxy.hxx"
 
 #include <cstring>
-#include <unordered_map>
 #include <vector>
 
+#include <frozen/unordered_map.h>
+
 #include <bridges/net_uno/net_context.hxx>
 
 namespace net_uno
@@ -22,7 +23,7 @@ namespace
 {
 size_t net_sizeof(typelib_TypeClass eTypeClass)
 {
-    static const std::unordered_map<typelib_TypeClass, size_t> s_sizes{
+    static constexpr frozen::unordered_map<typelib_TypeClass, size_t, 19> s_sizes{
         { typelib_TypeClass_BOOLEAN, sizeof(sal_Bool) },
         { typelib_TypeClass_BYTE, sizeof(sal_Int8) },
         { typelib_TypeClass_CHAR, sizeof(sal_Unicode) },