Add base::UnguessableToken

ipc/ipc_message_utils.cc

Index: ipc/ipc_message_utils.cc
diff --git a/ipc/ipc_message_utils.cc b/ipc/ipc_message_utils.cc
index 60c12ab60f96f879259612c993acf89d0c749cd0..8cf43339b71993ed9d4dd54da2003f951dc2edf9 100644
--- a/ipc/ipc_message_utils.cc
+++ b/ipc/ipc_message_utils.cc
@@ -9,6 +9,7 @@
 
 #include "base/files/file_path.h"
 #include "base/json/json_writer.h"
+#include "base/nonce.h"
 #include "base/strings/nullable_string16.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/utf_string_conversions.h"
@@ -998,6 +999,34 @@ void ParamTraits<base::TimeTicks>::Log(const param_type& p, std::string* l) {
   ParamTraits<int64_t>::Log(p.ToInternalValue(), l);
 }
 
+void ParamTraits<base::Nonce>::GetSize(base::PickleSizer* sizer,
+                                       const param_type& p) {
+  sizer->AddBytes(2 * sizeof(uint64_t));
+}
+
+void ParamTraits<base::Nonce>::Write(base::Pickle* m, const param_type& p) {
+  CHECK(!p.is_empty());
+  ParamTraits<uint64_t>::Write(m, p.high());
+  ParamTraits<uint64_t>::Write(m, p.low());
+}
+
+bool ParamTraits<base::Nonce>::Read(const base::Pickle* m,
+                                    base::PickleIterator* iter,
+                                    param_type* r) {
+  uint64_t high;
+  uint64_t low;
+  if (!ParamTraits<uint64_t>::Read(m, iter, &high) ||
+      !ParamTraits<uint64_t>::Read(m, iter, &low))
+    return false;
+
+  *r = base::Nonce::Deserialize(high, low);
+  return !r->is_empty();
+}
+
+void ParamTraits<base::Nonce>::Log(const param_type& p, std::string* l) {
+  l->append(p.ToString());
+}
+
 void ParamTraits<IPC::ChannelHandle>::GetSize(base::PickleSizer* sizer,
                                               const param_type& p) {
   GetParamSize(sizer, p.name);