Moved random generator state to global context.

src/objects.cc

Index: src/objects.cc
diff --git a/src/objects.cc b/src/objects.cc
index b4db9e5605a9212851a4b46cd4fbefadde2d8685..95c66acfcd46e291e234019811e9e5eb633511bc 100644
--- a/src/objects.cc
+++ b/src/objects.cc
@@ -3295,7 +3295,7 @@ Smi* JSReceiver::GenerateIdentityHash() {
   do {
     // Generate a random 32-bit hash value but limit range to fit
     // within a smi.
-    hash_value = V8::Random(isolate) & Smi::kMaxValue;
+    hash_value = V8::RandomPrivate(isolate) & Smi::kMaxValue;
     attempts++;
   } while (hash_value == 0 && attempts < 30);
   hash_value = hash_value != 0 ? hash_value : 1;  // never return 0