Replaced cc::SurfaceId::nonce_ with base::UnguessableToken

cc/ipc/cc_param_traits.cc

Index: cc/ipc/cc_param_traits.cc
diff --git a/cc/ipc/cc_param_traits.cc b/cc/ipc/cc_param_traits.cc
index 6d7eb5291c39a73ff998c1772dd6410112761c67..348a1391abafa450555ce45ca1e30bd8110c52df 100644
--- a/cc/ipc/cc_param_traits.cc
+++ b/cc/ipc/cc_param_traits.cc
@@ -9,6 +9,7 @@
 
 #include "base/numerics/safe_conversions.h"
 #include "base/time/time.h"
+#include "base/unguessable_token.h"
 #include "cc/output/compositor_frame.h"
 #include "cc/output/filter_operations.h"
 #include "cc/quads/debug_border_draw_quad.h"
@@ -592,7 +593,7 @@ bool ParamTraits<cc::SurfaceId>::Read(const base::Pickle* m,
   if (!ReadParam(m, iter, &local_id))
     return false;
 
-  uint64_t nonce;
+  base::UnguessableToken nonce;
   if (!ReadParam(m, iter, &nonce))
     return false;