Introduce a RandonNumberGenerator class. Refactor the random/private_random uses in Isolate/Context.

src/platform-freebsd.cc

Index: src/platform-freebsd.cc
diff --git a/src/platform-freebsd.cc b/src/platform-freebsd.cc
index b21ebf73b1cfedb5f33fadc56a972db41123573a..007bc0dbd6820bf4d500435329eb75f775aa6b9d 100644
--- a/src/platform-freebsd.cc
+++ b/src/platform-freebsd.cc
@@ -340,16 +340,4 @@ bool VirtualMemory::HasLazyCommits() {
   return false;
 }
 
-
-void OS::SetUp() {
-  // Seed the random number generator.
-  // Convert the current time to a 64-bit integer first, before converting it
-  // to an unsigned. Going directly can cause an overflow and the seed to be
-  // set to all ones. The seed will be identical for different instances that
-  // call this setup code within the same millisecond.
-  uint64_t seed = static_cast<uint64_t>(TimeCurrentMillis());
-  srandom(static_cast<unsigned int>(seed));
-}
-
-
 } }  // namespace v8::internal