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

src/platform-macos.cc

Index: src/platform-macos.cc
diff --git a/src/platform-macos.cc b/src/platform-macos.cc
index 5dd38b2619dde524f4853e721b9c51a4536fa0b0..f61873703dcc0f3f3b157ea29dd6e822cf35862c 100644
--- a/src/platform-macos.cc
+++ b/src/platform-macos.cc
@@ -360,12 +360,4 @@ bool VirtualMemory::HasLazyCommits() {
   return false;
 }
 
-
-void OS::SetUp() {
-  // Seed the random number generator. We preserve microsecond resolution.
-  uint64_t seed = static_cast<uint64_t>(TimeCurrentMillis()) ^ (getpid() << 16);
-  srandom(static_cast<unsigned int>(seed));
-}
-
-
 } }  // namespace v8::internal